521190526081 has 4 divisors (see below), whose sum is σ = 523527703552. Its totient is φ = 518853348612.

The previous prime is 521190526067. The next prime is 521190526123. The reversal of 521190526081 is 180625091125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 521190526081 - 2¹¹ = 521190524033 is a prime.

It is a super-2 number, since 2×521190526081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521190529081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1168588401 + ... + 1168588846.

It is an arithmetic number, because the mean of its divisors is an integer number (130881925888).

Almost surely, 2^521190526081 is an apocalyptic number.

It is an amenable number.

521190526081 is a deficient number, since it is larger than the sum of its proper divisors (2337177471).

521190526081 is a wasteful number, since it uses less digits than its factorization.

521190526081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2337177470.

The product of its (nonzero) digits is 43200, while the sum is 40.

The spelling of 521190526081 in words is "five hundred twenty-one billion, one hundred ninety million, five hundred twenty-six thousand, eighty-one".