72644706566146 has 128 divisors (see below), whose sum is σ = 132726329229312. Its totient is φ = 29367932832000.

The previous prime is 72644706566141. The next prime is 72644706566149. The reversal of 72644706566146 is 64166560744627.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (72644706566141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2434703940 + ... + 2434733776.

It is an arithmetic number, because the mean of its divisors is an integer number (1036924447104).

Almost surely, 2^{72644706566146} is an apocalyptic number.

72644706566146 is a deficient number, since it is larger than the sum of its proper divisors (60081622663166).

72644706566146 is a wasteful number, since it uses less digits than its factorization.

72644706566146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31088.

The product of its (nonzero) digits is 243855360, while the sum is 64.

The spelling of 72644706566146 in words is "seventy-two trillion, six hundred forty-four billion, seven hundred six million, five hundred sixty-six thousand, one hundred forty-six".