531388380738 has 32 divisors (see below), whose sum is σ = 1063797716736. Its totient is φ = 176959390608.

The previous prime is 531388380703. The next prime is 531388380769. The reversal of 531388380738 is 837083883135.

It is a happy number.

It is a super-2 number, since 2×531388380738² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29639445 + ... + 29657367.

It is an arithmetic number, because the mean of its divisors is an integer number (33243678648).

Almost surely, 2^531388380738 is an apocalyptic number.

531388380738 is an abundant number, since it is smaller than the sum of its proper divisors (532409335998).

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

531388380738 is a wasteful number, since it uses less digits than its factorization.

531388380738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22398.

The product of its (nonzero) digits is 11612160, while the sum is 57.

The spelling of 531388380738 in words is "five hundred thirty-one billion, three hundred eighty-eight million, three hundred eighty thousand, seven hundred thirty-eight".