72517504802 has 4 divisors (see below), whose sum is σ = 108776257206. Its totient is φ = 36258752400.

The previous prime is 72517504799. The next prime is 72517504823. The reversal of 72517504802 is 20840571527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20840571527 = 599 ⋅34792273.

It can be written as a sum of positive squares in only one way, i.e., 51957099481 + 20560405321 = 227941^2 + 143389^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 72517504802.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18129376199 + ... + 18129376202.

Almost surely, 2^72517504802 is an apocalyptic number.

72517504802 is a deficient number, since it is larger than the sum of its proper divisors (36258752404).

72517504802 is a wasteful number, since it uses less digits than its factorization.

72517504802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36258752403.

The product of its (nonzero) digits is 156800, while the sum is 41.

The spelling of 72517504802 in words is "seventy-two billion, five hundred seventeen million, five hundred four thousand, eight hundred two".