72317702407 has 4 divisors (see below), whose sum is σ = 72484718320. Its totient is φ = 72150686496.

The previous prime is 72317702399. The next prime is 72317702411. The reversal of 72317702407 is 70420771327.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70420771327 = 103 ⋅683696809.

It is a cyclic number.

It is not a de Polignac number, because 72317702407 - 2³ = 72317702399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72317702407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72317702437) 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, 83507307 + ... + 83508172.

It is an arithmetic number, because the mean of its divisors is an integer number (18121179580).

Almost surely, 2^72317702407 is an apocalyptic number.

72317702407 is a deficient number, since it is larger than the sum of its proper divisors (167015913).

72317702407 is a wasteful number, since it uses less digits than its factorization.

72317702407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167015912.

The product of its (nonzero) digits is 115248, while the sum is 40.

The spelling of 72317702407 in words is "seventy-two billion, three hundred seventeen million, seven hundred two thousand, four hundred seven".