72125668075 has 6 divisors (see below), whose sum is σ = 89435828444. Its totient is φ = 57700534440.

The previous prime is 72125668073. The next prime is 72125668079. The reversal of 72125668075 is 57086652127.

It is a happy number.

It is not a de Polignac number, because 72125668075 - 2¹ = 72125668073 is a prime.

It is a super-2 number, since 2×72125668075² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72125668073) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1442513337 + ... + 1442513386.

Almost surely, 2^72125668075 is an apocalyptic number.

72125668075 is a deficient number, since it is larger than the sum of its proper divisors (17310160369).

72125668075 is a wasteful number, since it uses less digits than its factorization.

72125668075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2885026733 (or 2885026728 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 72125668075 in words is "seventy-two billion, one hundred twenty-five million, six hundred sixty-eight thousand, seventy-five".