3778632864 has 36 divisors (see below), whose sum is σ = 10745488026. Its totient is φ = 1259544192.

The previous prime is 3778632841. The next prime is 3778632883. The reversal of 3778632864 is 4682368773.

It can be written as a sum of positive squares in only one way, i.e., 1927912464 + 1850720400 = 43908^2 + 43020^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 3778632864.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6559839 + ... + 6560414.

Almost surely, 2^3778632864 is an apocalyptic number.

It is an amenable number.

3778632864 is an abundant number, since it is smaller than the sum of its proper divisors (6966855162).

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

3778632864 is a wasteful number, since it uses less digits than its factorization.

3778632864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13120269 (or 13120258 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 54.

The square root of 3778632864 is about 61470.5853559245. The cubic root of 3778632864 is about 1557.5604077613.

The spelling of 3778632864 in words is "three billion, seven hundred seventy-eight million, six hundred thirty-two thousand, eight hundred sixty-four".