78117803587 has 8 divisors (see below), whose sum is σ = 78535138976. Its totient is φ = 77700598272.

The previous prime is 78117803579. The next prime is 78117803609. The reversal of 78117803587 is 78530871187.

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 78117803587 - 2³ = 78117803579 is a prime.

It is a super-2 number, since 2×78117803587² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78117803537) 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, 1321498 + ... + 1379344.

It is an arithmetic number, because the mean of its divisors is an integer number (9816892372).

Almost surely, 2^78117803587 is an apocalyptic number.

78117803587 is a deficient number, since it is larger than the sum of its proper divisors (417335389).

78117803587 is a wasteful number, since it uses less digits than its factorization.

78117803587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65037.

The product of its (nonzero) digits is 2634240, while the sum is 55.

The spelling of 78117803587 in words is "seventy-eight billion, one hundred seventeen million, eight hundred three thousand, five hundred eighty-seven".