72102944405 has 4 divisors (see below), whose sum is σ = 86523533292. Its totient is φ = 57682355520.

The previous prime is 72102944387. The next prime is 72102944453. The reversal of 72102944405 is 50444920127.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35848499569 + 36254444836 = 189337^2 + 190406^2 .

It is not a de Polignac number, because 72102944405 - 2¹⁴ = 72102928021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 7210294436 + ... + 7210294445.

It is an arithmetic number, because the mean of its divisors is an integer number (21630883323).

Almost surely, 2^72102944405 is an apocalyptic number.

It is an amenable number.

72102944405 is a deficient number, since it is larger than the sum of its proper divisors (14420588887).

72102944405 is a wasteful number, since it uses less digits than its factorization.

72102944405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14420588886.

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 72102944405 in words is "seventy-two billion, one hundred two million, nine hundred forty-four thousand, four hundred five".