72381795751 has 4 divisors (see below), whose sum is σ = 72749216232. Its totient is φ = 72014375272.

The previous prime is 72381795749. The next prime is 72381795769. The reversal of 72381795751 is 15759718327.

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 72381795751 - 2¹ = 72381795749 is a prime.

It is a super-2 number, since 2×72381795751² (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 = 72381795692 and 72381795701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72381795721) 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, 183709945 + ... + 183710338.

It is an arithmetic number, because the mean of its divisors is an integer number (18187304058).

Almost surely, 2^72381795751 is an apocalyptic number.

72381795751 is a deficient number, since it is larger than the sum of its proper divisors (367420481).

72381795751 is a wasteful number, since it uses less digits than its factorization.

72381795751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367420480.

The product of its digits is 3704400, while the sum is 55.

The spelling of 72381795751 in words is "seventy-two billion, three hundred eighty-one million, seven hundred ninety-five thousand, seven hundred fifty-one".