72678478216 has 64 divisors (see below), whose sum is σ = 145883836800. Its totient is φ = 33844262400.

The previous prime is 72678478207. The next prime is 72678478231. The reversal of 72678478216 is 61287487627.

It is a super-2 number, since 2×72678478216² (a number of 23 digits) contains 22 as substring.

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, 3440326 + ... + 3461386.

It is an arithmetic number, because the mean of its divisors is an integer number (2279434950).

Almost surely, 2^72678478216 is an apocalyptic number.

72678478216 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

72678478216 is an abundant number, since it is smaller than the sum of its proper divisors (73205358584).

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

72678478216 is a wasteful number, since it uses less digits than its factorization.

72678478216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21470 (or 21466 counting only the distinct ones).

The product of its digits is 12644352, while the sum is 58.

The spelling of 72678478216 in words is "seventy-two billion, six hundred seventy-eight million, four hundred seventy-eight thousand, two hundred sixteen".