72187411568 has 80 divisors (see below), whose sum is σ = 143250831360. Its totient is φ = 35232164352.

The previous prime is 72187411501. The next prime is 72187411573. The reversal of 72187411568 is 86511478127.

It is a happy number.

It is a super-2 number, since 2×72187411568² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67908605 + ... + 67909667.

It is an arithmetic number, because the mean of its divisors is an integer number (1790635392).

Almost surely, 2^72187411568 is an apocalyptic number.

It is an amenable number.

72187411568 is a deficient number, since it is larger than the sum of its proper divisors (71063419792).

72187411568 is a wasteful number, since it uses less digits than its factorization.

72187411568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726 (or 1720 counting only the distinct ones).

The product of its digits is 752640, while the sum is 50.

The spelling of 72187411568 in words is "seventy-two billion, one hundred eighty-seven million, four hundred eleven thousand, five hundred sixty-eight".