531251386464 has 48 divisors (see below), whose sum is σ = 1455166847232. Its totient is φ = 169384499328.

The previous prime is 531251386447. The next prime is 531251386481. The reversal of 531251386464 is 464683152135.

It is an interprime number because it is at equal distance from previous prime (531251386447) and next prime (531251386481).

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120299284 + ... + 120303699.

It is an arithmetic number, because the mean of its divisors is an integer number (30315975984).

Almost surely, 2^531251386464 is an apocalyptic number.

It is an amenable number.

531251386464 is an abundant number, since it is smaller than the sum of its proper divisors (923915460768).

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

531251386464 is a wasteful number, since it uses less digits than its factorization.

531251386464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240603019 (or 240603011 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 48.

The spelling of 531251386464 in words is "five hundred thirty-one billion, two hundred fifty-one million, three hundred eighty-six thousand, four hundred sixty-four".