2532605661 has 6 divisors (see below), whose sum is σ = 3658208190. Its totient is φ = 1688403768.

The previous prime is 2532605657. The next prime is 2532605681. The reversal of 2532605661 is 1665062352.

It is a happy number.

2532605661 is a `hidden beast` number, since 2 + 5 + 32 + 60 + 566 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2532605625 + 36 = 50325^2 + 6^2 .

It is not a de Polignac number, because 2532605661 - 2² = 2532605657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2532605611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 140700306 + ... + 140700323.

It is an arithmetic number, because the mean of its divisors is an integer number (609701365).

Almost surely, 2^2532605661 is an apocalyptic number.

It is an amenable number.

2532605661 is a deficient number, since it is larger than the sum of its proper divisors (1125602529).

2532605661 is a wasteful number, since it uses less digits than its factorization.

2532605661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281400635 (or 281400632 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 2532605661 is about 50325.0003576751. Note that the first 3 decimals coincide. The cubic root of 2532605661 is about 1363.0836999206.

Subtracting from 2532605661 its sum of digits (36), we obtain a square (2532605625 = 50325²).

The spelling of 2532605661 in words is "two billion, five hundred thirty-two million, six hundred five thousand, six hundred sixty-one".