3561396881 has 48 divisors (see below), whose sum is σ = 4410158400. Its totient is φ = 2863099008.

The previous prime is 3561396863. The next prime is 3561396911. The reversal of 3561396881 is 1886931653.

It is a happy number.

It is not a de Polignac number, because 3561396881 - 2¹⁰ = 3561395857 is a prime.

It is a super-2 number, since 2×3561396881² = 25367095487993056322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3561396821) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8970575 + ... + 8970971.

It is an arithmetic number, because the mean of its divisors is an integer number (91878300).

Almost surely, 2^3561396881 is an apocalyptic number.

It is an amenable number.

3561396881 is a deficient number, since it is larger than the sum of its proper divisors (848761519).

3561396881 is a wasteful number, since it uses less digits than its factorization.

3561396881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606 (or 599 counting only the distinct ones).

The product of its digits is 933120, while the sum is 50.

The square root of 3561396881 is about 59677.4403020103. The cubic root of 3561396881 is about 1527.1210304877.

The spelling of 3561396881 in words is "three billion, five hundred sixty-one million, three hundred ninety-six thousand, eight hundred eighty-one".