523216756420 has 48 divisors (see below), whose sum is σ = 1163481360048. Its totient is φ = 196959887360.

The previous prime is 523216756409. The next prime is 523216756481. The reversal of 523216756420 is 24657612325.

It can be written as a sum of positive squares in 8 ways, for example, as 25040530564 + 498176225856 = 158242^2 + 705816^2 .

It is a super-2 number, since 2×523216756420² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4716390 + ... + 4826050.

It is an arithmetic number, because the mean of its divisors is an integer number (24239195001).

Almost surely, 2^523216756420 is an apocalyptic number.

It is an amenable number.

523216756420 is an abundant number, since it is smaller than the sum of its proper divisors (640264603628).

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

523216756420 is a wasteful number, since it uses less digits than its factorization.

523216756420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123720 (or 123718 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 43.

The spelling of 523216756420 in words is "five hundred twenty-three billion, two hundred sixteen million, seven hundred fifty-six thousand, four hundred twenty".