3888278319656 has 8 divisors (see below), whose sum is σ = 7290521849370. Its totient is φ = 1944139159824.

The previous prime is 3888278319647. The next prime is 3888278319659. The reversal of 3888278319656 is 6569138728883.

It can be written as a sum of positive squares in only one way, i.e., 3836309822500 + 51968497156 = 1958650^2 + 227966^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×3888278319656² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3888278319659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243017394971 + ... + 243017394986.

Almost surely, 2^{3888278319656} is an apocalyptic number.

It is an amenable number.

3888278319656 is a deficient number, since it is larger than the sum of its proper divisors (3402243529714).

3888278319656 is a wasteful number, since it uses less digits than its factorization.

3888278319656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486034789963 (or 486034789959 counting only the distinct ones).

The product of its digits is 836075520, while the sum is 74.

The spelling of 3888278319656 in words is "three trillion, eight hundred eighty-eight billion, two hundred seventy-eight million, three hundred nineteen thousand, six hundred fifty-six".