72674750861 has 4 divisors (see below), whose sum is σ = 72675719424. Its totient is φ = 72673782300.

The previous prime is 72674750857. The next prime is 72674750879. The reversal of 72674750861 is 16805747627.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16805747627 = 19 ⋅884513033.

It is a cyclic number.

It is not a de Polignac number, because 72674750861 - 2² = 72674750857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72674750851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361325 + ... + 525266.

It is an arithmetic number, because the mean of its divisors is an integer number (18168929856).

Almost surely, 2^72674750861 is an apocalyptic number.

It is an amenable number.

72674750861 is a deficient number, since it is larger than the sum of its proper divisors (968563).

72674750861 is an equidigital number, since it uses as much as digits as its factorization.

72674750861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968562.

The product of its (nonzero) digits is 3951360, while the sum is 53.

The spelling of 72674750861 in words is "seventy-two billion, six hundred seventy-four million, seven hundred fifty thousand, eight hundred sixty-one".