523687795421 has 24 divisors (see below), whose sum is σ = 629189602560. Its totient is φ = 434153260800.

The previous prime is 523687795403. The next prime is 523687795471. The reversal of 523687795421 is 124597786325.

It is not a de Polignac number, because 523687795421 - 2¹⁸ = 523687533277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523687795471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2655725 + ... + 2846093.

It is an arithmetic number, because the mean of its divisors is an integer number (26216233440).

Almost surely, 2^523687795421 is an apocalyptic number.

It is an amenable number.

523687795421 is a deficient number, since it is larger than the sum of its proper divisors (105501807139).

523687795421 is a wasteful number, since it uses less digits than its factorization.

523687795421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192225 (or 192218 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 59.

The spelling of 523687795421 in words is "five hundred twenty-three billion, six hundred eighty-seven million, seven hundred ninety-five thousand, four hundred twenty-one".