71537255020 has 72 divisors (see below), whose sum is σ = 190642168080. Its totient is φ = 22297322880.

The previous prime is 71537254979. The next prime is 71537255021. The reversal of 71537255020 is 2055273517.

It is not an unprimeable number, because it can be changed into a prime (71537255021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3307275 + ... + 3328834.

It is an arithmetic number, because the mean of its divisors is an integer number (2647807890).

Almost surely, 2^71537255020 is an apocalyptic number.

71537255020 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

71537255020 is an abundant number, since it is smaller than the sum of its proper divisors (119104913060).

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

71537255020 is a wasteful number, since it uses less digits than its factorization.

71537255020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6636143 (or 6636134 counting only the distinct ones).

The product of its (nonzero) digits is 73500, while the sum is 37.

The spelling of 71537255020 in words is "seventy-one billion, five hundred thirty-seven million, two hundred fifty-five thousand, twenty".