313491186978 has 16 divisors (see below), whose sum is σ = 630606551616. Its totient is φ = 103893032720.

The previous prime is 313491186977. The next prime is 313491186997. The reversal of 313491186978 is 879681194313.

313491186978 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (313491186977) 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, 151006278 + ... + 151008353.

It is an arithmetic number, because the mean of its divisors is an integer number (39412909476).

Almost surely, 2^313491186978 is an apocalyptic number.

313491186978 is an abundant number, since it is smaller than the sum of its proper divisors (317115364638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

313491186978 is a wasteful number, since it uses less digits than its factorization.

313491186978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302014809.

The product of its digits is 7838208, while the sum is 60.

The spelling of 313491186978 in words is "three hundred thirteen billion, four hundred ninety-one million, one hundred eighty-six thousand, nine hundred seventy-eight".