72793681987 has 8 divisors (see below), whose sum is σ = 78574248704. Its totient is φ = 67038979968.

The previous prime is 72793681973. The next prime is 72793681991. The reversal of 72793681987 is 78918639727.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72793681987 - 2²⁷ = 72659464259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72793681907) 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, 6460323 + ... + 6471580.

It is an arithmetic number, because the mean of its divisors is an integer number (9821781088).

Almost surely, 2^72793681987 is an apocalyptic number.

72793681987 is a deficient number, since it is larger than the sum of its proper divisors (5780566717).

72793681987 is a wasteful number, since it uses less digits than its factorization.

72793681987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12932349.

The product of its digits is 64012032, while the sum is 67.

The spelling of 72793681987 in words is "seventy-two billion, seven hundred ninety-three million, six hundred eighty-one thousand, nine hundred eighty-seven".