78298306387 has 16 divisors (see below), whose sum is σ = 90671696640. Its totient is φ = 66223857312.

The previous prime is 78298306381. The next prime is 78298306397. The reversal of 78298306387 is 78360389287.

It is a cyclic number.

It is not a de Polignac number, because 78298306387 - 2²³ = 78289917779 is a prime.

It is a super-2 number, since 2×78298306387² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78298306381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400368 + ... + 562930.

It is an arithmetic number, because the mean of its divisors is an integer number (5666981040).

Almost surely, 2^78298306387 is an apocalyptic number.

78298306387 is a deficient number, since it is larger than the sum of its proper divisors (12373390253).

78298306387 is a wasteful number, since it uses less digits than its factorization.

78298306387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163482.

The product of its (nonzero) digits is 24385536, while the sum is 61.

The spelling of 78298306387 in words is "seventy-eight billion, two hundred ninety-eight million, three hundred six thousand, three hundred eighty-seven".