72189475468 has 24 divisors (see below), whose sum is σ = 137999844864. Its totient is φ = 32769690000.

The previous prime is 72189475459. The next prime is 72189475471. The reversal of 72189475468 is 86457498127.

It is a super-2 number, since 2×72189475468² (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 7 ways as a sum of consecutive naturals, for example, 1059280 + ... + 1125367.

It is an arithmetic number, because the mean of its divisors is an integer number (5749993536).

Almost surely, 2^72189475468 is an apocalyptic number.

It is an amenable number.

72189475468 is a deficient number, since it is larger than the sum of its proper divisors (65810369396).

72189475468 is a wasteful number, since it uses less digits than its factorization.

72189475468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2185413 (or 2185411 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 61.

The spelling of 72189475468 in words is "seventy-two billion, one hundred eighty-nine million, four hundred seventy-five thousand, four hundred sixty-eight".