1310381915688 has 64 divisors (see below), whose sum is σ = 3641176708800. Its totient is φ = 436646738880.

The previous prime is 1310381915629. The next prime is 1310381915699. The reversal of 1310381915688 is 8865191830131.

It is a happy number.

1310381915688 is a `hidden beast` number, since 1 + 31 + 0 + 38 + 19 + 1 + 568 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379231 + ... + 1662702.

It is an arithmetic number, because the mean of its divisors is an integer number (56893386075).

Almost surely, 2^{1310381915688} is an apocalyptic number.

1310381915688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1310381915688 is an abundant number, since it is smaller than the sum of its proper divisors (2330794793112).

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

1310381915688 is a wasteful number, since it uses less digits than its factorization.

1310381915688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044919 (or 2044909 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 54.

The spelling of 1310381915688 in words is "one trillion, three hundred ten billion, three hundred eighty-one million, nine hundred fifteen thousand, six hundred eighty-eight".