72731850371 has 4 divisors (see below), whose sum is σ = 72734575200. Its totient is φ = 72729125544.

The previous prime is 72731850361. The next prime is 72731850379. The reversal of 72731850371 is 17305813727.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72731850371 - 2¹⁰ = 72731849347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72731850379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1321976 + ... + 1375893.

It is an arithmetic number, because the mean of its divisors is an integer number (18183643800).

Almost surely, 2^72731850371 is an apocalyptic number.

72731850371 is a deficient number, since it is larger than the sum of its proper divisors (2724829).

72731850371 is a wasteful number, since it uses less digits than its factorization.

72731850371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2724828.

The product of its (nonzero) digits is 246960, while the sum is 44.

The spelling of 72731850371 in words is "seventy-two billion, seven hundred thirty-one million, eight hundred fifty thousand, three hundred seventy-one".