78316858690 has 32 divisors (see below), whose sum is σ = 161119762560. Its totient is φ = 26849695104.

The previous prime is 78316858673. The next prime is 78316858691. The reversal of 78316858690 is 9685861387.

It is a super-2 number, since 2×78316858690² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78316858691) 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, 1412206 + ... + 1466614.

It is an arithmetic number, because the mean of its divisors is an integer number (5034992580).

Almost surely, 2^78316858690 is an apocalyptic number.

78316858690 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78316858690 is an abundant number, since it is smaller than the sum of its proper divisors (82802903870).

78316858690 is a wasteful number, since it uses less digits than its factorization.

78316858690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74986.

The product of its (nonzero) digits is 17418240, while the sum is 61.

The spelling of 78316858690 in words is "seventy-eight billion, three hundred sixteen million, eight hundred fifty-eight thousand, six hundred ninety".