72187822975 has 12 divisors (see below), whose sum is σ = 92599553160. Its totient is φ = 55758869600.

The previous prime is 72187822909. The next prime is 72187822979. The reversal of 72187822975 is 57922878127.

It is not a de Polignac number, because 72187822975 - 2¹¹ = 72187820927 is a prime.

It is a super-2 number, since 2×72187822975² (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 (72187822979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49783981 + ... + 49785430.

It is an arithmetic number, because the mean of its divisors is an integer number (7716629430).

Almost surely, 2^72187822975 is an apocalyptic number.

72187822975 is a deficient number, since it is larger than the sum of its proper divisors (20411730185).

72187822975 is a wasteful number, since it uses less digits than its factorization.

72187822975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99569450 (or 99569445 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 58.

The spelling of 72187822975 in words is "seventy-two billion, one hundred eighty-seven million, eight hundred twenty-two thousand, nine hundred seventy-five".