2002255111661 has 4 divisors (see below), whose sum is σ = 2288291556192. Its totient is φ = 1716218667132.

The previous prime is 2002255111657. The next prime is 2002255111721. The reversal of 2002255111661 is 1661115522002.

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 2002255111661 - 2² = 2002255111657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002255111651) 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, 143018222255 + ... + 143018222268.

It is an arithmetic number, because the mean of its divisors is an integer number (572072889048).

Almost surely, 2^{2002255111661} is an apocalyptic number.

It is an amenable number.

2002255111661 is a deficient number, since it is larger than the sum of its proper divisors (286036444531).

2002255111661 is an equidigital number, since it uses as much as digits as its factorization.

2002255111661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286036444530.

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 2002255111661 in words is "two trillion, two billion, two hundred fifty-five million, one hundred eleven thousand, six hundred sixty-one".