2153237661 has 40 divisors (see below), whose sum is σ = 3283308864. Its totient is φ = 1405978560.

The previous prime is 2153237623. The next prime is 2153237677. The reversal of 2153237661 is 1667323512.

It is not a de Polignac number, because 2153237661 - 2¹⁰ = 2153236637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153237761) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 936265 + ... + 938561.

Almost surely, 2^2153237661 is an apocalyptic number.

It is an amenable number.

2153237661 is a deficient number, since it is larger than the sum of its proper divisors (1130071203).

2153237661 is a wasteful number, since it uses less digits than its factorization.

2153237661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543 (or 2534 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 2153237661 is about 46402.9919401756. The cubic root of 2153237661 is about 1291.3104206832.

The spelling of 2153237661 in words is "two billion, one hundred fifty-three million, two hundred thirty-seven thousand, six hundred sixty-one".