72038510399 has 4 divisors (see below), whose sum is σ = 73795547280. Its totient is φ = 70281473520.

The previous prime is 72038510389. The next prime is 72038510413. The reversal of 72038510399 is 99301583027.

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

It is a cyclic number.

It is not a de Polignac number, because 72038510399 - 2⁸ = 72038510143 is a prime.

It is a super-2 number, since 2×72038510399² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72038510389) 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, 878518379 + ... + 878518460.

It is an arithmetic number, because the mean of its divisors is an integer number (18448886820).

Almost surely, 2^72038510399 is an apocalyptic number.

72038510399 is a deficient number, since it is larger than the sum of its proper divisors (1757036881).

72038510399 is a wasteful number, since it uses less digits than its factorization.

72038510399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757036880.

The product of its (nonzero) digits is 408240, while the sum is 47.

The spelling of 72038510399 in words is "seventy-two billion, thirty-eight million, five hundred ten thousand, three hundred ninety-nine".