1377778764 has 12 divisors (see below), whose sum is σ = 3214817144. Its totient is φ = 459259584.

The previous prime is 1377778751. The next prime is 1377778771. The reversal of 1377778764 is 4678777731.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57407437 + ... + 57407460.

Almost surely, 2^1377778764 is an apocalyptic number.

It is an amenable number.

1377778764 is an abundant number, since it is smaller than the sum of its proper divisors (1837038380).

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

1377778764 is a wasteful number, since it uses less digits than its factorization.

1377778764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114814904 (or 114814902 counting only the distinct ones).

The product of its digits is 9680832, while the sum is 57.

The square root of 1377778764 is about 37118.4423703366. The cubic root of 1377778764 is about 1112.7386219444.

The spelling of 1377778764 in words is "one billion, three hundred seventy-seven million, seven hundred seventy-eight thousand, seven hundred sixty-four".