31136603653 has 4 divisors (see below), whose sum is σ = 31137461100. Its totient is φ = 31135746208.

The previous prime is 31136603651. The next prime is 31136603683. The reversal of 31136603653 is 35630663113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35630663113 = 52369 ⋅680377.

It can be written as a sum of positive squares in 2 ways, for example, as 27337976964 + 3798626689 = 165342^2 + 61633^2 .

It is a cyclic number.

It is not a de Polignac number, because 31136603653 - 2¹ = 31136603651 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 (31136603651) 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, 371728 + ... + 447721.

It is an arithmetic number, because the mean of its divisors is an integer number (7784365275).

Almost surely, 2^31136603653 is an apocalyptic number.

It is an amenable number.

31136603653 is a deficient number, since it is larger than the sum of its proper divisors (857447).

31136603653 is an equidigital number, since it uses as much as digits as its factorization.

31136603653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857446.

The product of its (nonzero) digits is 87480, while the sum is 37.

The spelling of 31136603653 in words is "thirty-one billion, one hundred thirty-six million, six hundred three thousand, six hundred fifty-three".