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61868465 = 519651247
BaseRepresentation
bin1110110000000…
…0100110110001
311022102020120122
43230000212301
5111314242330
610050020025
71350605351
oct354004661
9138366518
1061868465
1131a1776a
1218877615
13ca82579
148306b61
1556715e5
hex3b009b1

61868465 has 8 divisors (see below), whose sum is σ = 78149760. Its totient is φ = 46889712.

The previous prime is 61868461. The next prime is 61868473. The reversal of 61868465 is 56486816.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61868465 - 22 = 61868461 is a prime.

It is a super-3 number, since 3×618684653 (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (61868461) 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 7 ways as a sum of consecutive naturals, for example, 325529 + ... + 325718.

It is an arithmetic number, because the mean of its divisors is an integer number (9768720).

Almost surely, 261868465 is an apocalyptic number.

It is an amenable number.

61868465 is a deficient number, since it is larger than the sum of its proper divisors (16281295).

61868465 is a wasteful number, since it uses less digits than its factorization.

61868465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651271.

The product of its digits is 276480, while the sum is 44.

The square root of 61868465 is about 7865.6509584395. The cubic root of 61868465 is about 395.5090696428.

The spelling of 61868465 in words is "sixty-one million, eight hundred sixty-eight thousand, four hundred sixty-five".

Divisors: 1 5 19 95 651247 3256235 12373693 61868465