51642655640434 has 32 divisors (see below), whose sum is σ = 79348818916224. Its totient is φ = 25194325484160.

The previous prime is 51642655640309. The next prime is 51642655640453. The reversal of 51642655640434 is 43404655624615.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 334454472 + ... + 334608844.

It is an arithmetic number, because the mean of its divisors is an integer number (2479650591132).

Almost surely, 2^{51642655640434} is an apocalyptic number.

51642655640434 is a deficient number, since it is larger than the sum of its proper divisors (27706163275790).

51642655640434 is a wasteful number, since it uses less digits than its factorization.

51642655640434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158482.

The product of its (nonzero) digits is 41472000, while the sum is 55.

The spelling of 51642655640434 in words is "fifty-one trillion, six hundred forty-two billion, six hundred fifty-five million, six hundred forty thousand, four hundred thirty-four".