72651393211 has 4 divisors (see below), whose sum is σ = 72654013432. Its totient is φ = 72648772992.

The previous prime is 72651393209. The next prime is 72651393229. The reversal of 72651393211 is 11239315627.

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 72651393211 - 2¹ = 72651393209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72651313211) 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, 1268070 + ... + 1324123.

It is an arithmetic number, because the mean of its divisors is an integer number (18163503358).

Almost surely, 2^72651393211 is an apocalyptic number.

72651393211 is a deficient number, since it is larger than the sum of its proper divisors (2620221).

72651393211 is a wasteful number, since it uses less digits than its factorization.

72651393211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2620220.

The product of its digits is 68040, while the sum is 40.

The spelling of 72651393211 in words is "seventy-two billion, six hundred fifty-one million, three hundred ninety-three thousand, two hundred eleven".