71322761920 has 56 divisors (see below), whose sum is σ = 169898043744. Its totient is φ = 28518905856.

The previous prime is 71322761879. The next prime is 71322761921. The reversal of 71322761920 is 2916722317.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (71322761921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 890572 + ... + 967348.

Almost surely, 2^71322761920 is an apocalyptic number.

It is an amenable number.

71322761920 is an abundant number, since it is smaller than the sum of its proper divisors (98575281824).

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

71322761920 is a wasteful number, since it uses less digits than its factorization.

71322761920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79697 (or 79687 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 40.

The spelling of 71322761920 in words is "seventy-one billion, three hundred twenty-two million, seven hundred sixty-one thousand, nine hundred twenty".