521077040393 has 24 divisors (see below), whose sum is σ = 644970048768. Its totient is φ = 412203572352.

The previous prime is 521077040389. The next prime is 521077040413. The reversal of 521077040393 is 393040770125.

It is not a de Polignac number, because 521077040393 - 2² = 521077040389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 521077040393.

It is not an unprimeable number, because it can be changed into a prime (521077040383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6755621 + ... + 6832317.

It is an arithmetic number, because the mean of its divisors is an integer number (26873752032).

Almost surely, 2^521077040393 is an apocalyptic number.

It is an amenable number.

521077040393 is a deficient number, since it is larger than the sum of its proper divisors (123893008375).

521077040393 is a wasteful number, since it uses less digits than its factorization.

521077040393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82473 (or 82460 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 41.

The spelling of 521077040393 in words is "five hundred twenty-one billion, seventy-seven million, forty thousand, three hundred ninety-three".