72873015715 has 4 divisors (see below), whose sum is σ = 87447618864. Its totient is φ = 58298412568.

The previous prime is 72873015689. The next prime is 72873015757. The reversal of 72873015715 is 51751037827.

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 72873015715 - 2¹³ = 72873007523 is a prime.

It is a super-2 number, since 2×72873015715² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7287301567 + ... + 7287301576.

It is an arithmetic number, because the mean of its divisors is an integer number (21861904716).

Almost surely, 2^72873015715 is an apocalyptic number.

72873015715 is a deficient number, since it is larger than the sum of its proper divisors (14574603149).

72873015715 is a wasteful number, since it uses less digits than its factorization.

72873015715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14574603148.

The product of its (nonzero) digits is 411600, while the sum is 46.

The spelling of 72873015715 in words is "seventy-two billion, eight hundred seventy-three million, fifteen thousand, seven hundred fifteen".