1313107778 has 16 divisors (see below), whose sum is σ = 2099343744. Its totient is φ = 613838400.

The previous prime is 1313107769. The next prime is 1313107781. The reversal of 1313107778 is 8777013131.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122750 + ... + 133017.

It is an arithmetic number, because the mean of its divisors is an integer number (131208984).

Almost surely, 2^1313107778 is an apocalyptic number.

1313107778 is a deficient number, since it is larger than the sum of its proper divisors (786235966).

1313107778 is a wasteful number, since it uses less digits than its factorization.

1313107778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255937.

The product of its (nonzero) digits is 24696, while the sum is 38.

The square root of 1313107778 is about 36236.8290279379. The cubic root of 1313107778 is about 1095.0487605039.

The spelling of 1313107778 in words is "one billion, three hundred thirteen million, one hundred seven thousand, seven hundred seventy-eight".