72273762558 has 48 divisors (see below), whose sum is σ = 163225879440. Its totient is φ = 23090272128.

The previous prime is 72273762551. The next prime is 72273762559. The reversal of 72273762558 is 85526737227.

72273762558 is a `hidden beast` number, since 7 + 2 + 2 + 7 + 3 + 7 + 625 + 5 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72273762551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 765223 + ... + 854466.

It is an arithmetic number, because the mean of its divisors is an integer number (3400539155).

Almost surely, 2^72273762558 is an apocalyptic number.

72273762558 is an abundant number, since it is smaller than the sum of its proper divisors (90952116882).

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

72273762558 is a wasteful number, since it uses less digits than its factorization.

72273762558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1619801 (or 1619798 counting only the distinct ones).

The product of its digits is 9878400, while the sum is 54.

The spelling of 72273762558 in words is "seventy-two billion, two hundred seventy-three million, seven hundred sixty-two thousand, five hundred fifty-eight".