72749893917 has 4 divisors (see below), whose sum is σ = 96999858560. Its totient is φ = 48499929276.

The previous prime is 72749893883. The next prime is 72749893919. The reversal of 72749893917 is 71939894727.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 72749893917 - 2¹⁶ = 72749828381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72749893919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12124982317 + ... + 12124982322.

It is an arithmetic number, because the mean of its divisors is an integer number (24249964640).

Almost surely, 2^72749893917 is an apocalyptic number.

It is an amenable number.

72749893917 is a deficient number, since it is larger than the sum of its proper divisors (24249964643).

72749893917 is a wasteful number, since it uses less digits than its factorization.

72749893917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24249964642.

The product of its digits is 48009024, while the sum is 66.

The spelling of 72749893917 in words is "seventy-two billion, seven hundred forty-nine million, eight hundred ninety-three thousand, nine hundred seventeen".