531387775628 has 12 divisors (see below), whose sum is σ = 943026193872. Its totient is φ = 261951720240.

The previous prime is 531387775579. The next prime is 531387775651. The reversal of 531387775628 is 826577783135.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 935541575 + ... + 935542142.

It is an arithmetic number, because the mean of its divisors is an integer number (78585516156).

Almost surely, 2^531387775628 is an apocalyptic number.

It is an amenable number.

531387775628 is a deficient number, since it is larger than the sum of its proper divisors (411638418244).

531387775628 is a wasteful number, since it uses less digits than its factorization.

531387775628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1871083792 (or 1871083790 counting only the distinct ones).

The product of its digits is 59270400, while the sum is 62.

The spelling of 531387775628 in words is "five hundred thirty-one billion, three hundred eighty-seven million, seven hundred seventy-five thousand, six hundred twenty-eight".