2203051636561 has 4 divisors (see below), whose sum is σ = 2214122248000. Its totient is φ = 2191981025124.

The previous prime is 2203051636523. The next prime is 2203051636601. The reversal of 2203051636561 is 1656361503022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2203051636561 - 2²⁵ = 2203018082129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2203051636061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5535305421 + ... + 5535305818.

It is an arithmetic number, because the mean of its divisors is an integer number (553530562000).

Almost surely, 2^{2203051636561} is an apocalyptic number.

It is an amenable number.

2203051636561 is a deficient number, since it is larger than the sum of its proper divisors (11070611439).

2203051636561 is a wasteful number, since it uses less digits than its factorization.

2203051636561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11070611438.

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

The spelling of 2203051636561 in words is "two trillion, two hundred three billion, fifty-one million, six hundred thirty-six thousand, five hundred sixty-one".