78417890713 has 16 divisors (see below), whose sum is σ = 82277320320. Its totient is φ = 74636601984.

The previous prime is 78417890699. The next prime is 78417890729. The reversal of 78417890713 is 31709871487.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78417890713 is a prime.

It is a super-2 number, since 2×78417890713² (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 (78417893713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4400820 + ... + 4418602.

It is an arithmetic number, because the mean of its divisors is an integer number (5142332520).

Almost surely, 2^78417890713 is an apocalyptic number.

78417890713 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

78417890713 is a deficient number, since it is larger than the sum of its proper divisors (3859429607).

78417890713 is a wasteful number, since it uses less digits than its factorization.

78417890713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19968.

The product of its (nonzero) digits is 2370816, while the sum is 55.

The spelling of 78417890713 in words is "seventy-eight billion, four hundred seventeen million, eight hundred ninety thousand, seven hundred thirteen".