1313485778 has 16 divisors (see below), whose sum is σ = 2149900704. Its totient is φ = 596883360.

The previous prime is 1313485759. The next prime is 1313485847. The reversal of 1313485778 is 8775843131.

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, 146501 + ... + 155207.

It is an arithmetic number, because the mean of its divisors is an integer number (134368794).

Almost surely, 2^1313485778 is an apocalyptic number.

1313485778 is a deficient number, since it is larger than the sum of its proper divisors (836414926).

1313485778 is a wasteful number, since it uses less digits than its factorization.

1313485778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15577.

The product of its digits is 564480, while the sum is 47.

The square root of 1313485778 is about 36242.0443407929. The cubic root of 1313485778 is about 1095.1538264464.

The spelling of 1313485778 in words is "one billion, three hundred thirteen million, four hundred eighty-five thousand, seven hundred seventy-eight".