3561116640201 has 12 divisors (see below), whose sum is σ = 5143856273140. Its totient is φ = 2374068009600.

The previous prime is 3561116640173. The next prime is 3561116640203. The reversal of 3561116640201 is 1020466111653.

3561116640201 is a `hidden beast` number, since 3 + 5 + 6 + 1 + 1 + 1 + 6 + 640 + 2 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1136942375625 + 2424174264576 = 1066275^2 + 1556976^2 .

It is not a de Polignac number, because 3561116640201 - 2²³ = 3561108251593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3561116640203) 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, 2020365 + ... + 3347253.

Almost surely, 2^{3561116640201} is an apocalyptic number.

It is an amenable number.

3561116640201 is a deficient number, since it is larger than the sum of its proper divisors (1582739632939).

3561116640201 is a wasteful number, since it uses less digits than its factorization.

3561116640201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625096 (or 1625093 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 3561116640201 in words is "three trillion, five hundred sixty-one billion, one hundred sixteen million, six hundred forty thousand, two hundred one".