72572687997 has 4 divisors (see below), whose sum is σ = 96763584000. Its totient is φ = 48381791996.

The previous prime is 72572687951. The next prime is 72572688011. The reversal of 72572687997 is 79978627527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72572687997 - 2¹⁰ = 72572686973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72572687927) 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, 12095447997 + ... + 12095448002.

It is an arithmetic number, because the mean of its divisors is an integer number (24190896000).

Almost surely, 2^72572687997 is an apocalyptic number.

It is an amenable number.

72572687997 is a deficient number, since it is larger than the sum of its proper divisors (24190896003).

72572687997 is a wasteful number, since it uses less digits than its factorization.

72572687997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24190896002.

The product of its digits is 186701760, while the sum is 69.

The spelling of 72572687997 in words is "seventy-two billion, five hundred seventy-two million, six hundred eighty-seven thousand, nine hundred ninety-seven".