72161676 has 36 divisors (see below), whose sum is σ = 188295744. Its totient is φ = 23277600.

The previous prime is 72161669. The next prime is 72161693. The reversal of 72161676 is 67616127.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 72161676.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31215 + ... + 33446.

Almost surely, 2^72161676 is an apocalyptic number.

It is an amenable number.

72161676 is an abundant number, since it is smaller than the sum of its proper divisors (116134068).

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

72161676 is a wasteful number, since it uses less digits than its factorization.

72161676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64702 (or 64697 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 72161676 is about 8494.8028817625. The cubic root of 72161676 is about 416.3279203747.

The spelling of 72161676 in words is "seventy-two million, one hundred sixty-one thousand, six hundred seventy-six".