72170220152 has 16 divisors (see below), whose sum is σ = 138619630800. Its totient is φ = 35204985280.

The previous prime is 72170220137. The next prime is 72170220191. The reversal of 72170220152 is 25102207127.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110015252 + ... + 110015907.

It is an arithmetic number, because the mean of its divisors is an integer number (8663726925).

Almost surely, 2^72170220152 is an apocalyptic number.

It is an amenable number.

72170220152 is a deficient number, since it is larger than the sum of its proper divisors (66449410648).

72170220152 is a wasteful number, since it uses less digits than its factorization.

72170220152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220031206 (or 220031202 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 29.

Adding to 72170220152 its reverse (25102207127), we get a palindrome (97272427279).

The spelling of 72170220152 in words is "seventy-two billion, one hundred seventy million, two hundred twenty thousand, one hundred fifty-two".