72157140851 has 4 divisors (see below), whose sum is σ = 72255582432. Its totient is φ = 72058699272.

The previous prime is 72157140821. The next prime is 72157140871. The reversal of 72157140851 is 15804175127.

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 72157140851 - 2³⁴ = 54977271667 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72157140799 and 72157140808.

It is not an unprimeable number, because it can be changed into a prime (72157140821) 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, 49219691 + ... + 49221156.

It is an arithmetic number, because the mean of its divisors is an integer number (18063895608).

Almost surely, 2^72157140851 is an apocalyptic number.

72157140851 is a deficient number, since it is larger than the sum of its proper divisors (98441581).

72157140851 is an equidigital number, since it uses as much as digits as its factorization.

72157140851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98441580.

The product of its (nonzero) digits is 78400, while the sum is 41.

The spelling of 72157140851 in words is "seventy-two billion, one hundred fifty-seven million, one hundred forty thousand, eight hundred fifty-one".