72187068405 has 16 divisors (see below), whose sum is σ = 118316366784. Its totient is φ = 37560750720.

The previous prime is 72187068389. The next prime is 72187068407. The reversal of 72187068405 is 50486078127.

It is not a de Polignac number, because 72187068405 - 2⁴ = 72187068389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72187068407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58688059 + ... + 58689288.

It is an arithmetic number, because the mean of its divisors is an integer number (7394772924).

Almost surely, 2^72187068405 is an apocalyptic number.

It is an amenable number.

72187068405 is a deficient number, since it is larger than the sum of its proper divisors (46129298379).

72187068405 is a wasteful number, since it uses less digits than its factorization.

72187068405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117377396.

The product of its (nonzero) digits is 752640, while the sum is 48.

The spelling of 72187068405 in words is "seventy-two billion, one hundred eighty-seven million, sixty-eight thousand, four hundred five".