3561276961 has 12 divisors (see below), whose sum is σ = 3917982096. Its totient is φ = 3234612920.

The previous prime is 3561276941. The next prime is 3561277019. The reversal of 3561276961 is 1696721653.

It is a de Polignac number, because none of the positive numbers 2^k-3561276961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3561276941) 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, 128070 + ... + 153376.

It is an arithmetic number, because the mean of its divisors is an integer number (326498508).

Almost surely, 2^3561276961 is an apocalyptic number.

It is an amenable number.

3561276961 is a deficient number, since it is larger than the sum of its proper divisors (356705135).

3561276961 is a wasteful number, since it uses less digits than its factorization.

3561276961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26492 (or 26481 counting only the distinct ones).

The product of its digits is 408240, while the sum is 46.

The square root of 3561276961 is about 59676.4355587698. The cubic root of 3561276961 is about 1527.1038897968.

The spelling of 3561276961 in words is "three billion, five hundred sixty-one million, two hundred seventy-six thousand, nine hundred sixty-one".