72099360917 has 4 divisors (see below), whose sum is σ = 72968028000. Its totient is φ = 71230693836.

The previous prime is 72099360887. The next prime is 72099360923. The reversal of 72099360917 is 71906399027.

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.

It is a cyclic number.

It is not a de Polignac number, because 72099360917 - 2⁸ = 72099360661 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 (72099360937) 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, 434333417 + ... + 434333582.

It is an arithmetic number, because the mean of its divisors is an integer number (18242007000).

Almost surely, 2^72099360917 is an apocalyptic number.

It is an amenable number.

72099360917 is a deficient number, since it is larger than the sum of its proper divisors (868667083).

72099360917 is an equidigital number, since it uses as much as digits as its factorization.

72099360917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868667082.

The product of its (nonzero) digits is 1285956, while the sum is 53.

The spelling of 72099360917 in words is "seventy-two billion, ninety-nine million, three hundred sixty thousand, nine hundred seventeen".