72646164774507 has 32 divisors (see below), whose sum is σ = 104451931584000. Its totient is φ = 44760327010560.

The previous prime is 72646164774503. The next prime is 72646164774571. The reversal of 72646164774507 is 70547746164627.

It is not a de Polignac number, because 72646164774507 - 2² = 72646164774503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72646164774503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43392169 + ... + 45035237.

It is an arithmetic number, because the mean of its divisors is an integer number (3264122862000).

Almost surely, 2^{72646164774507} is an apocalyptic number.

72646164774507 is a deficient number, since it is larger than the sum of its proper divisors (31805766809493).

72646164774507 is a wasteful number, since it uses less digits than its factorization.

72646164774507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662051.

The product of its (nonzero) digits is 331914240, while the sum is 66.

The spelling of 72646164774507 in words is "seventy-two trillion, six hundred forty-six billion, one hundred sixty-four million, seven hundred seventy-four thousand, five hundred seven".