72945204918 has 32 divisors (see below), whose sum is σ = 146396436576. Its totient is φ = 24230803968.

The previous prime is 72945204911. The next prime is 72945204961. The reversal of 72945204918 is 81940254927.

It is a super-2 number, since 2×72945204918² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72945204911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4628580 + ... + 4644312.

It is an arithmetic number, because the mean of its divisors is an integer number (4574888643).

Almost surely, 2^72945204918 is an apocalyptic number.

72945204918 is an abundant number, since it is smaller than the sum of its proper divisors (73451231658).

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

72945204918 is a wasteful number, since it uses less digits than its factorization.

72945204918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18368.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 72945204918 in words is "seventy-two billion, nine hundred forty-five million, two hundred four thousand, nine hundred eighteen".