520513307761 has 8 divisors (see below), whose sum is σ = 521589094400. Its totient is φ = 519438316320.

The previous prime is 520513307737. The next prime is 520513307789. The reversal of 520513307761 is 167703315025.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 520513307761 - 2⁵ = 520513307729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520513307791) 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, 1120720 + ... + 1515598.

It is an arithmetic number, because the mean of its divisors is an integer number (65198636800).

Almost surely, 2^520513307761 is an apocalyptic number.

It is an amenable number.

520513307761 is a deficient number, since it is larger than the sum of its proper divisors (1075786639).

520513307761 is a wasteful number, since it uses less digits than its factorization.

520513307761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397599.

The product of its (nonzero) digits is 132300, while the sum is 40.

The spelling of 520513307761 in words is "five hundred twenty billion, five hundred thirteen million, three hundred seven thousand, seven hundred sixty-one".