12995640388 has 12 divisors (see below), whose sum is σ = 23357029612. Its totient is φ = 6322203360.

The previous prime is 12995640367. The next prime is 12995640391. The reversal of 12995640388 is 88304659921.

It can be written as a sum of positive squares in 2 ways, for example, as 4898880064 + 8096760324 = 69992^2 + 89982^2 .

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

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, 43904043 + ... + 43904338.

Almost surely, 2^12995640388 is an apocalyptic number.

It is an amenable number.

12995640388 is a deficient number, since it is larger than the sum of its proper divisors (10361389224).

12995640388 is a wasteful number, since it uses less digits than its factorization.

12995640388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87808422 (or 87808420 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 55.

The spelling of 12995640388 in words is "twelve billion, nine hundred ninety-five million, six hundred forty thousand, three hundred eighty-eight".