51455642536506 has 32 divisors (see below), whose sum is σ = 110842270862400. Its totient is φ = 15830400668544.

The previous prime is 51455642536469. The next prime is 51455642536559. The reversal of 51455642536506 is 60563524655415.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43257931 + ... + 44431518.

It is an arithmetic number, because the mean of its divisors is an integer number (3463820964450).

Almost surely, 2^{51455642536506} is an apocalyptic number.

51455642536506 is an abundant number, since it is smaller than the sum of its proper divisors (59386628325894).

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

51455642536506 is a wasteful number, since it uses less digits than its factorization.

51455642536506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87696990.

The product of its (nonzero) digits is 64800000, while the sum is 57.

The spelling of 51455642536506 in words is "fifty-one trillion, four hundred fifty-five billion, six hundred forty-two million, five hundred thirty-six thousand, five hundred six".