2135266161631 has 4 divisors (see below), whose sum is σ = 2204145715264. Its totient is φ = 2066386608000.

The previous prime is 2135266161607. The next prime is 2135266161643. The reversal of 2135266161631 is 1361616625312.

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

It is a cyclic number.

It is not a de Polignac number, because 2135266161631 - 2¹⁹ = 2135265637343 is a prime.

It is a super-2 number, since 2×2135266161631² (a number of 25 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 (2135266161131) 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, 34439776770 + ... + 34439776831.

It is an arithmetic number, because the mean of its divisors is an integer number (551036428816).

Almost surely, 2^{2135266161631} is an apocalyptic number.

2135266161631 is a deficient number, since it is larger than the sum of its proper divisors (68879553633).

2135266161631 is an equidigital number, since it uses as much as digits as its factorization.

2135266161631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68879553632.

The product of its digits is 233280, while the sum is 43.

The spelling of 2135266161631 in words is "two trillion, one hundred thirty-five billion, two hundred sixty-six million, one hundred sixty-one thousand, six hundred thirty-one".