71570015020 has 24 divisors (see below), whose sum is σ = 171768036384. Its totient is φ = 24538290816.

The previous prime is 71570014987. The next prime is 71570015021. The reversal of 71570015020 is 2051007517.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 71570015020.

It is not an unprimeable number, because it can be changed into a prime (71570015021) 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, 255607057 + ... + 255607336.

It is an arithmetic number, because the mean of its divisors is an integer number (7157001516).

Almost surely, 2^71570015020 is an apocalyptic number.

71570015020 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

71570015020 is an abundant number, since it is smaller than the sum of its proper divisors (100198021364).

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

71570015020 is a wasteful number, since it uses less digits than its factorization.

71570015020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511214409 (or 511214407 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 28.

The spelling of 71570015020 in words is "seventy-one billion, five hundred seventy million, fifteen thousand, twenty".