72764444409 has 4 divisors (see below), whose sum is σ = 97019259216. Its totient is φ = 48509629604.

The previous prime is 72764444407. The next prime is 72764444413. The reversal of 72764444409 is 90444446727.

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 a cyclic number.

It is not a de Polignac number, because 72764444409 - 2¹ = 72764444407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72764444407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12127407399 + ... + 12127407404.

It is an arithmetic number, because the mean of its divisors is an integer number (24254814804).

Almost surely, 2^72764444409 is an apocalyptic number.

It is an amenable number.

72764444409 is a deficient number, since it is larger than the sum of its proper divisors (24254814807).

72764444409 is a wasteful number, since it uses less digits than its factorization.

72764444409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24254814806.

The product of its (nonzero) digits is 5419008, while the sum is 51.

The spelling of 72764444409 in words is "seventy-two billion, seven hundred sixty-four million, four hundred forty-four thousand, four hundred nine".