51521450040520 has 32 divisors (see below), whose sum is σ = 120963404445120. Its totient is φ = 19712554797760.

The previous prime is 51521450040493. The next prime is 51521450040523. The reversal of 51521450040520 is 2504005412515.

It is not an unprimeable number, because it can be changed into a prime (51521450040523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28000787146 + ... + 28000788985.

It is an arithmetic number, because the mean of its divisors is an integer number (3780106388910).

Almost surely, 2^{51521450040520} is an apocalyptic number.

It is an amenable number.

51521450040520 is an abundant number, since it is smaller than the sum of its proper divisors (69441954404600).

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

51521450040520 is a wasteful number, since it uses less digits than its factorization.

51521450040520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56001576165 (or 56001576161 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 34.

The spelling of 51521450040520 in words is "fifty-one trillion, five hundred twenty-one billion, four hundred fifty million, forty thousand, five hundred twenty".