72081164 has 12 divisors (see below), whose sum is σ = 126265104. Its totient is φ = 36005424.

The previous prime is 72081161. The next prime is 72081167. The reversal of 72081164 is 46118027.

It is an interprime number because it is at equal distance from previous prime (72081161) and next prime (72081167).

It is not an unprimeable number, because it can be changed into a prime (72081161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3872 + ... + 12615.

It is an arithmetic number, because the mean of its divisors is an integer number (10522092).

Almost surely, 2^72081164 is an apocalyptic number.

It is an amenable number.

72081164 is a deficient number, since it is larger than the sum of its proper divisors (54183940).

72081164 is a wasteful number, since it uses less digits than its factorization.

72081164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17584 (or 17582 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 72081164 is about 8490.0626617240. The cubic root of 72081164 is about 416.1730280590.

The spelling of 72081164 in words is "seventy-two million, eighty-one thousand, one hundred sixty-four".