72556978760 has 32 divisors (see below), whose sum is σ = 186575088960. Its totient is φ = 24876678336.

The previous prime is 72556978721. The next prime is 72556978771. The reversal of 72556978760 is 6787965527.

It is a super-2 number, since 2×72556978760² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72556978693 and 72556978702.

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, 129565754 + ... + 129566313.

It is an arithmetic number, because the mean of its divisors is an integer number (5830471530).

Almost surely, 2^72556978760 is an apocalyptic number.

72556978760 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

72556978760 is an abundant number, since it is smaller than the sum of its proper divisors (114018110200).

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

72556978760 is a wasteful number, since it uses less digits than its factorization.

72556978760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259132085 (or 259132081 counting only the distinct ones).

The product of its (nonzero) digits is 44452800, while the sum is 62.

The spelling of 72556978760 in words is "seventy-two billion, five hundred fifty-six million, nine hundred seventy-eight thousand, seven hundred sixty".