72313126509 has 8 divisors (see below), whose sum is σ = 103834232992. Its totient is φ = 44500385520.

The previous prime is 72313126441. The next prime is 72313126541. The reversal of 72313126509 is 90562131327.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72313126509 - 2²⁵ = 72279572077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 1854182731 = 72313126509 / (7 + 2 + 3 + 1 + 3 + 1 + 2 + 6 + 5 + 0 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72313126579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 927091327 + ... + 927091404.

It is an arithmetic number, because the mean of its divisors is an integer number (12979279124).

Almost surely, 2^72313126509 is an apocalyptic number.

It is an amenable number.

72313126509 is a deficient number, since it is larger than the sum of its proper divisors (31521106483).

72313126509 is a wasteful number, since it uses less digits than its factorization.

72313126509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854182747.

The product of its (nonzero) digits is 68040, while the sum is 39.

The spelling of 72313126509 in words is "seventy-two billion, three hundred thirteen million, one hundred twenty-six thousand, five hundred nine".