521494676927 has 4 divisors (see below), whose sum is σ = 595993916496. Its totient is φ = 446995437360.

The previous prime is 521494676873. The next prime is 521494676929. The reversal of 521494676927 is 729676494125.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 521494676927 - 2⁶ = 521494676863 is a prime.

It is a super-2 number, since 2×521494676927² (a number of 24 digits) contains 22 as substring.

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 521494676927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521494676929) 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, 37249619774 + ... + 37249619787.

It is an arithmetic number, because the mean of its divisors is an integer number (148998479124).

Almost surely, 2^521494676927 is an apocalyptic number.

521494676927 is a deficient number, since it is larger than the sum of its proper divisors (74499239569).

521494676927 is an equidigital number, since it uses as much as digits as its factorization.

521494676927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74499239568.

The product of its digits is 45722880, while the sum is 62.

The spelling of 521494676927 in words is "five hundred twenty-one billion, four hundred ninety-four million, six hundred seventy-six thousand, nine hundred twenty-seven".