71574857182420 has 24 divisors (see below), whose sum is σ = 150710168463624. Its totient is φ = 28553186990976.

The previous prime is 71574857182363. The next prime is 71574857182427. The reversal of 71574857182420 is 2428175847517.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11501010646596 + 60073846535824 = 3391314^2 + 7750732^2 .

It is a super-2 number, since 2×71574857182420² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71574857182427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4797234979 + ... + 4797249898.

It is an arithmetic number, because the mean of its divisors is an integer number (6279590352651).

Almost surely, 2^{71574857182420} is an apocalyptic number.

It is an amenable number.

71574857182420 is an abundant number, since it is smaller than the sum of its proper divisors (79135311281204).

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

71574857182420 is a wasteful number, since it uses less digits than its factorization.

71574857182420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9594485259 (or 9594485257 counting only the distinct ones).

The product of its (nonzero) digits is 35123200, while the sum is 61.

The spelling of 71574857182420 in words is "seventy-one trillion, five hundred seventy-four billion, eight hundred fifty-seven million, one hundred eighty-two thousand, four hundred twenty".