71457546920 has 32 divisors (see below), whose sum is σ = 161351674920. Its totient is φ = 28481295360.

The previous prime is 71457546913. The next prime is 71457546949. The reversal of 71457546920 is 2964575417.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 58120530724 + 13337016196 = 241082^2 + 115486^2 .

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, 3167477 + ... + 3189956.

Almost surely, 2^71457546920 is an apocalyptic number.

It is an amenable number.

71457546920 is an abundant number, since it is smaller than the sum of its proper divisors (89894128000).

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

71457546920 is a wasteful number, since it uses less digits than its factorization.

71457546920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6357725 (or 6357721 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 50.

The spelling of 71457546920 in words is "seventy-one billion, four hundred fifty-seven million, five hundred forty-six thousand, nine hundred twenty".