1375863947388 has 72 divisors (see below), whose sum is σ = 3975004447232. Its totient is φ = 393075662112.

The previous prime is 1375863947383. The next prime is 1375863947431. The reversal of 1375863947388 is 8837493685731.

1375863947388 is a `hidden beast` number, since 1 + 3 + 7 + 586 + 3 + 9 + 4 + 7 + 38 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375863947383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3441081 + ... + 3820047.

Almost surely, 2^{1375863947388} is an apocalyptic number.

1375863947388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1375863947388 is an abundant number, since it is smaller than the sum of its proper divisors (2599140499844).

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

1375863947388 is a wasteful number, since it uses less digits than its factorization.

1375863947388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393391 (or 393386 counting only the distinct ones).

The product of its digits is 731566080, while the sum is 72.

The spelling of 1375863947388 in words is "one trillion, three hundred seventy-five billion, eight hundred sixty-three million, nine hundred forty-seven thousand, three hundred eighty-eight".