72165751225 has 12 divisors (see below), whose sum is σ = 89540853840. Its totient is φ = 57696909200.

The previous prime is 72165751219. The next prime is 72165751243. The reversal of 72165751225 is 52215756127.

It is not a de Polignac number, because 72165751225 - 2²⁹ = 71628880313 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 851011 + ... + 931960.

It is an arithmetic number, because the mean of its divisors is an integer number (7461737820).

Almost surely, 2^72165751225 is an apocalyptic number.

It is an amenable number.

72165751225 is a deficient number, since it is larger than the sum of its proper divisors (17375102615).

72165751225 is a wasteful number, since it uses less digits than its factorization.

72165751225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784600 (or 1784595 counting only the distinct ones).

The product of its digits is 294000, while the sum is 43.

The spelling of 72165751225 in words is "seventy-two billion, one hundred sixty-five million, seven hundred fifty-one thousand, two hundred twenty-five".