2635650661 has 12 divisors (see below), whose sum is σ = 3199264992. Its totient is φ = 2160905208.

The previous prime is 2635650593. The next prime is 2635650697. The reversal of 2635650661 is 1660565362.

It is a happy number.

2635650661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-2635650661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2635650961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1168195 + ... + 1170448.

It is an arithmetic number, because the mean of its divisors is an integer number (266605416).

Almost surely, 2^2635650661 is an apocalyptic number.

It is an amenable number.

2635650661 is a deficient number, since it is larger than the sum of its proper divisors (563614331).

2635650661 is a wasteful number, since it uses less digits than its factorization.

2635650661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338680 (or 2338673 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 40.

The square root of 2635650661 is about 51338.5884204075. The cubic root of 2635650661 is about 1381.3252446441.

The spelling of 2635650661 in words is "two billion, six hundred thirty-five million, six hundred fifty thousand, six hundred sixty-one".