1375821990431 has 16 divisors (see below), whose sum is σ = 1578121079808. Its totient is φ = 1174964529600.

The previous prime is 1375821990377. The next prime is 1375821990443. The reversal of 1375821990431 is 1340991285731.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1375821990431 is a prime.

It is a super-2 number, since 2×1375821990431² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375821990451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4827206 + ... + 5104268.

It is an arithmetic number, because the mean of its divisors is an integer number (98632567488).

Almost surely, 2^{1375821990431} is an apocalyptic number.

1375821990431 is a deficient number, since it is larger than the sum of its proper divisors (202299089377).

1375821990431 is a wasteful number, since it uses less digits than its factorization.

1375821990431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279662.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 1375821990431 in words is "one trillion, three hundred seventy-five billion, eight hundred twenty-one million, nine hundred ninety thousand, four hundred thirty-one".