521113257445 has 8 divisors (see below), whose sum is σ = 682184628000. Its totient is φ = 378991459920.

The previous prime is 521113257433. The next prime is 521113257461. The reversal of 521113257445 is 544752311125.

It is a happy number.

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

It is not a de Polignac number, because 521113257445 - 2³³ = 512523322853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521113257398 and 521113257407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4737393195 + ... + 4737393304.

It is an arithmetic number, because the mean of its divisors is an integer number (85273078500).

Almost surely, 2^521113257445 is an apocalyptic number.

521113257445 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

521113257445 is a deficient number, since it is larger than the sum of its proper divisors (161071370555).

521113257445 is a wasteful number, since it uses less digits than its factorization.

521113257445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9474786515.

The product of its digits is 168000, while the sum is 40.

The spelling of 521113257445 in words is "five hundred twenty-one billion, one hundred thirteen million, two hundred fifty-seven thousand, four hundred forty-five".