72165990810 has 32 divisors (see below), whose sum is σ = 174444419520. Its totient is φ = 19105815168.

The previous prime is 72165990773. The next prime is 72165990821. The reversal of 72165990810 is 1809956127.

It is a super-2 number, since 2×72165990810² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72165990810.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8648827 + ... + 8657166.

It is an arithmetic number, because the mean of its divisors is an integer number (5451388110).

Almost surely, 2^72165990810 is an apocalyptic number.

72165990810 is an abundant number, since it is smaller than the sum of its proper divisors (102278428710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72165990810 is a wasteful number, since it uses less digits than its factorization.

72165990810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17306142.

The product of its (nonzero) digits is 272160, while the sum is 48.

The spelling of 72165990810 in words is "seventy-two billion, one hundred sixty-five million, nine hundred ninety thousand, eight hundred ten".