51567840661403 has 16 divisors (see below), whose sum is σ = 58133039247360. Its totient is φ = 45318766598400.

The previous prime is 51567840661369. The next prime is 51567840661427. The reversal of 51567840661403 is 30416604876515.

It is a cyclic number.

It is not a de Polignac number, because 51567840661403 - 2⁴⁴ = 33975654616987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51567840661483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81074675 + ... + 81708252.

It is an arithmetic number, because the mean of its divisors is an integer number (3633314952960).

Almost surely, 2^{51567840661403} is an apocalyptic number.

51567840661403 is a deficient number, since it is larger than the sum of its proper divisors (6565198585957).

51567840661403 is a wasteful number, since it uses less digits than its factorization.

51567840661403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162783898.

The product of its (nonzero) digits is 14515200, while the sum is 56.

The spelling of 51567840661403 in words is "fifty-one trillion, five hundred sixty-seven billion, eight hundred forty million, six hundred sixty-one thousand, four hundred three".