72651682320 has 80 divisors (see below), whose sum is σ = 257394537600. Its totient is φ = 16606098432.

The previous prime is 72651682283. The next prime is 72651682339. The reversal of 72651682320 is 2328615627.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21620845 + ... + 21624204.

It is an arithmetic number, because the mean of its divisors is an integer number (3217431720).

Almost surely, 2^72651682320 is an apocalyptic number.

72651682320 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

72651682320 is an abundant number, since it is smaller than the sum of its proper divisors (184742855280).

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

72651682320 is a wasteful number, since it uses less digits than its factorization.

72651682320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43245072 (or 43245066 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 72651682320 in words is "seventy-two billion, six hundred fifty-one million, six hundred eighty-two thousand, three hundred twenty".