72921908652 has 24 divisors (see below), whose sum is σ = 174749800176. Its totient is φ = 23650348608.

The previous prime is 72921908651. The next prime is 72921908671. The reversal of 72921908652 is 25680912927.

It is a super-2 number, since 2×72921908652² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72921908595 and 72921908604.

It is not an unprimeable number, because it can be changed into a prime (72921908651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82118823 + ... + 82119710.

It is an arithmetic number, because the mean of its divisors is an integer number (7281241674).

Almost surely, 2^72921908652 is an apocalyptic number.

It is an amenable number.

72921908652 is an abundant number, since it is smaller than the sum of its proper divisors (101827891524).

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

72921908652 is a wasteful number, since it uses less digits than its factorization.

72921908652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164238577 (or 164238575 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 72921908652 in words is "seventy-two billion, nine hundred twenty-one million, nine hundred eight thousand, six hundred fifty-two".