72015252557498 has 4 divisors (see below), whose sum is σ = 108022878836250. Its totient is φ = 36007626278748.

The previous prime is 72015252557483. The next prime is 72015252557531. The reversal of 72015252557498 is 89475525251027.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 71949124892089 + 66127665409 = 8482283^2 + 257153^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72015252557498.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18003813139373 + ... + 18003813139376.

Almost surely, 2^{72015252557498} is an apocalyptic number.

72015252557498 is a deficient number, since it is larger than the sum of its proper divisors (36007626278752).

72015252557498 is a wasteful number, since it uses less digits than its factorization.

72015252557498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36007626278751.

The product of its (nonzero) digits is 70560000, while the sum is 62.

The spelling of 72015252557498 in words is "seventy-two trillion, fifteen billion, two hundred fifty-two million, five hundred fifty-seven thousand, four hundred ninety-eight".