13257773778 has 16 divisors (see below), whose sum is σ = 26561991456. Its totient is φ = 4411517280.

The previous prime is 13257773701. The next prime is 13257773791. The reversal of 13257773778 is 87737775231.

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, 1931451 + ... + 1938302.

It is an arithmetic number, because the mean of its divisors is an integer number (1660124466).

Almost surely, 2^13257773778 is an apocalyptic number.

13257773778 is an abundant number, since it is smaller than the sum of its proper divisors (13304217678).

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

13257773778 is a wasteful number, since it uses less digits than its factorization.

13257773778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3870329.

The product of its digits is 12101040, while the sum is 57.

The spelling of 13257773778 in words is "thirteen billion, two hundred fifty-seven million, seven hundred seventy-three thousand, seven hundred seventy-eight".