521242355545534 has 24 divisors (see below), whose sum is σ = 909529368893568. Its totient is φ = 223385983571520.

The previous prime is 521242355545493. The next prime is 521242355545573. The reversal of 521242355545534 is 435545553242125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36704827 + ... + 48884854.

It is an arithmetic number, because the mean of its divisors is an integer number (37897057037232).

Almost surely, 2^{521242355545534} is an apocalyptic number.

521242355545534 is a deficient number, since it is larger than the sum of its proper divisors (388287013348034).

521242355545534 is a wasteful number, since it uses less digits than its factorization.

521242355545534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85651840 (or 85651833 counting only the distinct ones).

The product of its digits is 72000000, while the sum is 55.

The spelling of 521242355545534 in words is "five hundred twenty-one trillion, two hundred forty-two billion, three hundred fifty-five million, five hundred forty-five thousand, five hundred thirty-four".