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12551291790 = 235418376393
BaseRepresentation
bin10111011000001110…
…11000001110001110
31012101201110200111220
423230013120032032
5201201112314130
65433241424210
7623014135302
oct135407301616
935351420456
1012551291790
115360971324
12252349b066
131250437c9b
14870d25d02
154d6d6b410
hex2ec1d838e

12551291790 has 16 divisors (see below), whose sum is σ = 30123100368. Its totient is φ = 3347011136.

The previous prime is 12551291783. The next prime is 12551291803. The reversal of 12551291790 is 9719215521.

12551291790 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209188167 + ... + 209188226.

It is an arithmetic number, because the mean of its divisors is an integer number (1882693773).

Almost surely, 212551291790 is an apocalyptic number.

12551291790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12551291790 is an abundant number, since it is smaller than the sum of its proper divisors (17571808578).

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

12551291790 is a wasteful number, since it uses less digits than its factorization.

12551291790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418376403.

The product of its (nonzero) digits is 56700, while the sum is 42.

The spelling of 12551291790 in words is "twelve billion, five hundred fifty-one million, two hundred ninety-one thousand, seven hundred ninety".

Divisors: 1 2 3 5 6 10 15 30 418376393 836752786 1255129179 2091881965 2510258358 4183763930 6275645895 12551291790