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681455776 = 2523925891
BaseRepresentation
bin101000100111100…
…011000010100000
31202111021112120211
4220213203002200
52343423041101
6151341543504
722613164351
oct5047430240
91674245524
10681455776
1131a7338a1
12170274b94
13ab248791
146670bd28
153ec5cc51
hex289e30a0

681455776 has 24 divisors (see below), whose sum is σ = 1399948704. Its totient is φ = 325913280.

The previous prime is 681455743. The next prime is 681455777. The reversal of 681455776 is 677554186.

It is a happy number.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (681455777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462210 + ... + 463681.

It is an arithmetic number, because the mean of its divisors is an integer number (58331196).

Almost surely, 2681455776 is an apocalyptic number.

It is an amenable number.

681455776 is an abundant number, since it is smaller than the sum of its proper divisors (718492928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681455776 is a wasteful number, since it uses less digits than its factorization.

681455776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925924 (or 925916 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 49.

The square root of 681455776 is about 26104.7079278815. The cubic root of 681455776 is about 879.9930164735.

The spelling of 681455776 in words is "six hundred eighty-one million, four hundred fifty-five thousand, seven hundred seventy-six".

Divisors: 1 2 4 8 16 23 32 46 92 184 368 736 925891 1851782 3703564 7407128 14814256 21295493 29628512 42590986 85181972 170363944 340727888 681455776