51564252110642 has 32 divisors (see below), whose sum is σ = 83167077560112. Its totient is φ = 23890157328384.

The previous prime is 51564252110629. The next prime is 51564252110731. The reversal of 51564252110642 is 24601125246515.

It can be written as a sum of positive squares in 8 ways, for example, as 13104769242601 + 38459482868041 = 3620051^2 + 6201571^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51564252110593 and 51564252110602.

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, 17266793 + ... + 20031740.

Almost surely, 2^{51564252110642} is an apocalyptic number.

51564252110642 is a deficient number, since it is larger than the sum of its proper divisors (31602825449470).

51564252110642 is a wasteful number, since it uses less digits than its factorization.

51564252110642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37299182.

The product of its (nonzero) digits is 576000, while the sum is 44.

The spelling of 51564252110642 in words is "fifty-one trillion, five hundred sixty-four billion, two hundred fifty-two million, one hundred ten thousand, six hundred forty-two".