2186298027961 has 6 divisors (see below), whose sum is σ = 2223981996362. Its totient is φ = 2149242125760.

The previous prime is 2186298027871. The next prime is 2186298027971. The reversal of 2186298027961 is 1697208926812.

It can be written as a sum of positive squares in only one way, i.e., 2040129445561 + 146168582400 = 1428331^2 + 382320^2 .

It is not a de Polignac number, because 2186298027961 - 2²⁵ = 2186264473529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2186298027961.

It is not an unprimeable number, because it can be changed into a prime (2186298027971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 314029560 + ... + 314036521.

Almost surely, 2^{2186298027961} is an apocalyptic number.

It is an amenable number.

2186298027961 is a deficient number, since it is larger than the sum of its proper divisors (37683968401).

2186298027961 is an frugal number, since it uses more digits than its factorization.

2186298027961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628066199 (or 628066140 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 61.

The spelling of 2186298027961 in words is "two trillion, one hundred eighty-six billion, two hundred ninety-eight million, twenty-seven thousand, nine hundred sixty-one".