72992311489 has 4 divisors (see below), whose sum is σ = 72993067056. Its totient is φ = 72991555924.

The previous prime is 72992311487. The next prime is 72992311493. The reversal of 72992311489 is 98411329927.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 72992311489 - 2¹ = 72992311487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72992311487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207199 + ... + 434644.

It is an arithmetic number, because the mean of its divisors is an integer number (18248266764).

Almost surely, 2^72992311489 is an apocalyptic number.

It is an amenable number.

72992311489 is a deficient number, since it is larger than the sum of its proper divisors (755567).

72992311489 is a wasteful number, since it uses less digits than its factorization.

72992311489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755566.

The product of its digits is 1959552, while the sum is 55.

The spelling of 72992311489 in words is "seventy-two billion, nine hundred ninety-two million, three hundred eleven thousand, four hundred eighty-nine".