531523745406 has 36 divisors (see below), whose sum is σ = 1192715723472. Its totient is φ = 171065108592.

The previous prime is 531523745399. The next prime is 531523745429. The reversal of 531523745406 is 604547325135.

531523745406 is a `hidden beast` number, since 5 + 3 + 1 + 5 + 237 + 4 + 5 + 406 = 666.

It is a super-2 number, since 2×531523745406² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 17540806 + ... + 17571081.

Almost surely, 2^531523745406 is an apocalyptic number.

531523745406 is an abundant number, since it is smaller than the sum of its proper divisors (661191978066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531523745406 is a wasteful number, since it uses less digits than its factorization.

531523745406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35111953 (or 35111921 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 45.

The spelling of 531523745406 in words is "five hundred thirty-one billion, five hundred twenty-three million, seven hundred forty-five thousand, four hundred six".