51855043402656 has 144 divisors (see below), whose sum is σ = 160816274760960. Its totient is φ = 15753430817280.

The previous prime is 51855043402621. The next prime is 51855043402697. The reversal of 51855043402656 is 65620434055815.

51855043402656 is a `hidden beast` number, since 5 + 1 + 8 + 550 + 4 + 34 + 0 + 2 + 6 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87363540 + ... + 87955091.

It is an arithmetic number, because the mean of its divisors is an integer number (1116779685840).

Almost surely, 2^{51855043402656} is an apocalyptic number.

It is an amenable number.

51855043402656 is an abundant number, since it is smaller than the sum of its proper divisors (108961231358304).

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

51855043402656 is a wasteful number, since it uses less digits than its factorization.

51855043402656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175318739 (or 175318728 counting only the distinct ones).

The product of its (nonzero) digits is 17280000, while the sum is 54.

The spelling of 51855043402656 in words is "fifty-one trillion, eight hundred fifty-five billion, forty-three million, four hundred two thousand, six hundred fifty-six".