72161316 has 36 divisors (see below), whose sum is σ = 192010000. Its totient is φ = 22787568.

The previous prime is 72161269. The next prime is 72161317. The reversal of 72161316 is 61316127.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 72161316.

It is not an unprimeable number, because it can be changed into a prime (72161317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52066 + ... + 53433.

Almost surely, 2^72161316 is an apocalyptic number.

72161316 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

72161316 is an abundant number, since it is smaller than the sum of its proper divisors (119848684).

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

72161316 is a wasteful number, since it uses less digits than its factorization.

72161316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105528 (or 105523 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 72161316 is about 8494.7816923097. The cubic root of 72161316 is about 416.3272280483.

The spelling of 72161316 in words is "seventy-two million, one hundred sixty-one thousand, three hundred sixteen".