131381028357639 has 4 divisors (see below), whose sum is σ = 175174704476856. Its totient is φ = 87587352238424.

The previous prime is 131381028357637. The next prime is 131381028357641. The reversal of 131381028357639 is 936753820183131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (131381028357637) and next prime (131381028357641).

It is a cyclic number.

It is not a de Polignac number, because 131381028357639 - 2¹ = 131381028357637 is a prime.

It is a super-2 number, since 2×131381028357639² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131381028357637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21896838059604 + ... + 21896838059609.

It is an arithmetic number, because the mean of its divisors is an integer number (43793676119214).

Almost surely, 2^{131381028357639} is an apocalyptic number.

131381028357639 is a deficient number, since it is larger than the sum of its proper divisors (43793676119217).

131381028357639 is an equidigital number, since it uses as much as digits as its factorization.

131381028357639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43793676119216.

The product of its (nonzero) digits is 19595520, while the sum is 60.

The spelling of 131381028357639 in words is "one hundred thirty-one trillion, three hundred eighty-one billion, twenty-eight million, three hundred fifty-seven thousand, six hundred thirty-nine".