72653165251 has 4 divisors (see below), whose sum is σ = 76926880872. Its totient is φ = 68379449632.

The previous prime is 72653165177. The next prime is 72653165287. The reversal of 72653165251 is 15256135627.

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 72653165251 - 2¹⁵ = 72653132483 is a prime.

It is a super-2 number, since 2×72653165251² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72653165198 and 72653165207.

It is not an unprimeable number, because it can be changed into a prime (72653165051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2136857785 + ... + 2136857818.

It is an arithmetic number, because the mean of its divisors is an integer number (19231720218).

Almost surely, 2^72653165251 is an apocalyptic number.

72653165251 is a deficient number, since it is larger than the sum of its proper divisors (4273715621).

72653165251 is a wasteful number, since it uses less digits than its factorization.

72653165251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4273715620.

The product of its digits is 378000, while the sum is 43.

The spelling of 72653165251 in words is "seventy-two billion, six hundred fifty-three million, one hundred sixty-five thousand, two hundred fifty-one".