78749673587 has 8 divisors (see below), whose sum is σ = 84826321104. Its totient is φ = 72675737568.

The previous prime is 78749673539. The next prime is 78749673599. The reversal of 78749673587 is 78537694787.

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 78749673587 - 2²² = 78745479283 is a prime.

It is a super-2 number, since 2×78749673587² (a number of 23 digits) contains 22 as substring.

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 78749673587.

It is not an unprimeable number, because it can be changed into a prime (78749673517) 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, 617348 + ... + 733905.

It is an arithmetic number, because the mean of its divisors is an integer number (10603290138).

Almost surely, 2^78749673587 is an apocalyptic number.

78749673587 is a deficient number, since it is larger than the sum of its proper divisors (6076647517).

78749673587 is a wasteful number, since it uses less digits than its factorization.

78749673587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355749.

The product of its digits is 497871360, while the sum is 71.

The spelling of 78749673587 in words is "seventy-eight billion, seven hundred forty-nine million, six hundred seventy-three thousand, five hundred eighty-seven".