72158146864 has 20 divisors (see below), whose sum is σ = 139848333856. Its totient is φ = 36068254272.

The previous prime is 72158146861. The next prime is 72158146903. The reversal of 72158146864 is 46864185127.

It is not an unprimeable number, because it can be changed into a prime (72158146861) 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, 621039 + ... + 728014.

Almost surely, 2^72158146864 is an apocalyptic number.

It is an amenable number.

72158146864 is a deficient number, since it is larger than the sum of its proper divisors (67690186992).

72158146864 is a wasteful number, since it uses less digits than its factorization.

72158146864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352404 (or 1352398 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 52.

The spelling of 72158146864 in words is "seventy-two billion, one hundred fifty-eight million, one hundred forty-six thousand, eight hundred sixty-four".