115853965021 has 8 divisors (see below), whose sum is σ = 116491514040. Its totient is φ = 115216915968.

The previous prime is 115853965009. The next prime is 115853965027. The reversal of 115853965021 is 120569358511.

It can be written as a sum of positive squares in 4 ways, for example, as 83494992025 + 32358972996 = 288955^2 + 179886^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 115853965021 - 2⁷ = 115853964893 is a prime.

It is a super-2 number, since 2×115853965021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115853965027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344565 + ... + 591973.

It is an arithmetic number, because the mean of its divisors is an integer number (14561439255).

Almost surely, 2^115853965021 is an apocalyptic number.

It is an amenable number.

115853965021 is a deficient number, since it is larger than the sum of its proper divisors (637549019).

115853965021 is a wasteful number, since it uses less digits than its factorization.

115853965021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249983.

The product of its (nonzero) digits is 324000, while the sum is 46.

The spelling of 115853965021 in words is "one hundred fifteen billion, eight hundred fifty-three million, nine hundred sixty-five thousand, twenty-one".