113851806637 has 4 divisors (see below), whose sum is σ = 113852483100. Its totient is φ = 113851130176.

The previous prime is 113851806623. The next prime is 113851806671. The reversal of 113851806637 is 736608158311.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 81100217961 + 32751588676 = 284781^2 + 180974^2 .

It is a cyclic number.

It is not a de Polignac number, because 113851806637 - 2¹¹ = 113851804589 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113851846637) 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 3 ways as a sum of consecutive naturals, for example, 133989 + ... + 495637.

It is an arithmetic number, because the mean of its divisors is an integer number (28463120775).

Almost surely, 2^113851806637 is an apocalyptic number.

It is an amenable number.

113851806637 is a deficient number, since it is larger than the sum of its proper divisors (676463).

113851806637 is an equidigital number, since it uses as much as digits as its factorization.

113851806637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676462.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 113851806637 in words is "one hundred thirteen billion, eight hundred fifty-one million, eight hundred six thousand, six hundred thirty-seven".