72773304520 has 96 divisors (see below), whose sum is σ = 193156073280. Its totient is φ = 24599379840.

The previous prime is 72773304463. The next prime is 72773304521. The reversal of 72773304520 is 2540337727.

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 (72773304521) 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, 122314 + ... + 400633.

It is an arithmetic number, because the mean of its divisors is an integer number (2012042430).

Almost surely, 2^72773304520 is an apocalyptic number.

72773304520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

72773304520 is an abundant number, since it is smaller than the sum of its proper divisors (120382768760).

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

72773304520 is a wasteful number, since it uses less digits than its factorization.

72773304520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523043 (or 523032 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 40.

The spelling of 72773304520 in words is "seventy-two billion, seven hundred seventy-three million, three hundred four thousand, five hundred twenty".