72912892107 has 32 divisors (see below), whose sum is σ = 107697703680. Its totient is φ = 43505953920.

The previous prime is 72912892099. The next prime is 72912892109. The reversal of 72912892107 is 70129821927.

It is a happy number.

It is not a de Polignac number, because 72912892107 - 2³ = 72912892099 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (72912892109) 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, 4477993 + ... + 4494245.

It is an arithmetic number, because the mean of its divisors is an integer number (3365553240).

Almost surely, 2^72912892107 is an apocalyptic number.

72912892107 is a deficient number, since it is larger than the sum of its proper divisors (34784811573).

72912892107 is a wasteful number, since it uses less digits than its factorization.

72912892107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18363.

The product of its (nonzero) digits is 254016, while the sum is 48.

The spelling of 72912892107 in words is "seventy-two billion, nine hundred twelve million, eight hundred ninety-two thousand, one hundred seven".