78013598990 has 8 divisors (see below), whose sum is σ = 140424478200. Its totient is φ = 31205439592.

The previous prime is 78013598977. The next prime is 78013599019. The reversal of 78013598990 is 9989531087.

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

It is a super-2 number, since 2×78013598990² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3900679940 + ... + 3900679959.

It is an arithmetic number, because the mean of its divisors is an integer number (17553059775).

Almost surely, 2^78013598990 is an apocalyptic number.

78013598990 is a deficient number, since it is larger than the sum of its proper divisors (62410879210).

78013598990 is a wasteful number, since it uses less digits than its factorization.

78013598990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7801359906.

The product of its (nonzero) digits is 4898880, while the sum is 59.

The spelling of 78013598990 in words is "seventy-eight billion, thirteen million, five hundred ninety-eight thousand, nine hundred ninety".