16131855613 has 8 divisors (see below), whose sum is σ = 16540425720. Its totient is φ = 15724005120.

The previous prime is 16131855587. The next prime is 16131855617. The reversal of 16131855613 is 31655813161.

It is a happy number.

16131855613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3617604 + 16128238009 = 1902^2 + 126997^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16131855613 - 2¹³ = 16131847421 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 (16131855617) 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 7 ways as a sum of consecutive naturals, for example, 134358 + ... + 224311.

It is an arithmetic number, because the mean of its divisors is an integer number (2067553215).

Almost surely, 2^16131855613 is an apocalyptic number.

It is an amenable number.

16131855613 is a deficient number, since it is larger than the sum of its proper divisors (408570107).

16131855613 is a wasteful number, since it uses less digits than its factorization.

16131855613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359807.

The product of its digits is 64800, while the sum is 40.

The spelling of 16131855613 in words is "sixteen billion, one hundred thirty-one million, eight hundred fifty-five thousand, six hundred thirteen".