1331382957879 has 32 divisors (see below), whose sum is σ = 1940645109760. Its totient is φ = 807012968832.

The previous prime is 1331382957871. The next prime is 1331382957887. The reversal of 1331382957879 is 9787592831331.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1331382957871) and next prime (1331382957887).

It is not a de Polignac number, because 1331382957879 - 2³ = 1331382957871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331382957871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 278452 + ... + 1655385.

It is an arithmetic number, because the mean of its divisors is an integer number (60645159680).

Almost surely, 2^{1331382957879} is an apocalyptic number.

1331382957879 is a deficient number, since it is larger than the sum of its proper divisors (609262151881).

1331382957879 is a wasteful number, since it uses less digits than its factorization.

1331382957879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1934119.

The product of its digits is 68584320, while the sum is 66.

The spelling of 1331382957879 in words is "one trillion, three hundred thirty-one billion, three hundred eighty-two million, nine hundred fifty-seven thousand, eight hundred seventy-nine".