521465536445 has 24 divisors (see below), whose sum is σ = 727955968608. Its totient is φ = 357560330400.

The previous prime is 521465536399. The next prime is 521465536477. The reversal of 521465536445 is 544635564125.

It is not a de Polignac number, because 521465536445 - 2¹⁶ = 521465470909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521465536393 and 521465536402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8665310 + ... + 8725280.

It is an arithmetic number, because the mean of its divisors is an integer number (30331498692).

Almost surely, 2^521465536445 is an apocalyptic number.

It is an amenable number.

521465536445 is a deficient number, since it is larger than the sum of its proper divisors (206490432163).

521465536445 is a wasteful number, since it uses less digits than its factorization.

521465536445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95481 (or 95474 counting only the distinct ones).

The product of its digits is 8640000, while the sum is 50.

The spelling of 521465536445 in words is "five hundred twenty-one billion, four hundred sixty-five million, five hundred thirty-six thousand, four hundred forty-five".