72525166155 has 48 divisors (see below), whose sum is σ = 139614564960. Its totient is φ = 35704685952.

The previous prime is 72525166111. The next prime is 72525166157. The reversal of 72525166155 is 55166152527.

72525166155 is a `hidden beast` number, since 7 + 2 + 5 + 25 + 1 + 6 + 615 + 5 = 666.

It is not a de Polignac number, because 72525166155 - 2¹⁹ = 72524641867 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 72525166155.

It is not an unprimeable number, because it can be changed into a prime (72525166157) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1566604 + ... + 1612233.

It is an arithmetic number, because the mean of its divisors is an integer number (2908636770).

Almost surely, 2^72525166155 is an apocalyptic number.

72525166155 is a deficient number, since it is larger than the sum of its proper divisors (67089398805).

72525166155 is a wasteful number, since it uses less digits than its factorization.

72525166155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3178877 (or 3178858 counting only the distinct ones).

The product of its digits is 630000, while the sum is 45.

The spelling of 72525166155 in words is "seventy-two billion, five hundred twenty-five million, one hundred sixty-six thousand, one hundred fifty-five".