71520388550912 has 36 divisors (see below), whose sum is σ = 163155886385856. Its totient is φ = 30651595092480.

The previous prime is 71520388550899. The next prime is 71520388550927. The reversal of 71520388550912 is 21905588302517.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19955463764 + ... + 19955467347.

Almost surely, 2^{71520388550912} is an apocalyptic number.

It is an amenable number.

71520388550912 is an abundant number, since it is smaller than the sum of its proper divisors (91635497834944).

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

71520388550912 is an equidigital number, since it uses as much as digits as its factorization.

71520388550912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39910931134 (or 39910931120 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 56.

The spelling of 71520388550912 in words is "seventy-one trillion, five hundred twenty billion, three hundred eighty-eight million, five hundred fifty thousand, nine hundred twelve".