2190566377591 has 4 divisors (see below), whose sum is σ = 2285808394032. Its totient is φ = 2095324361152.

The previous prime is 2190566377543. The next prime is 2190566377609. The reversal of 2190566377591 is 1957736650912.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2190566377591 - 2⁷ = 2190566377463 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 (2190566377501) 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, 47621008186 + ... + 47621008231.

It is an arithmetic number, because the mean of its divisors is an integer number (571452098508).

Almost surely, 2^{2190566377591} is an apocalyptic number.

2190566377591 is a deficient number, since it is larger than the sum of its proper divisors (95242016441).

2190566377591 is an equidigital number, since it uses as much as digits as its factorization.

2190566377591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95242016440.

The product of its (nonzero) digits is 21432600, while the sum is 61.

The spelling of 2190566377591 in words is "two trillion, one hundred ninety billion, five hundred sixty-six million, three hundred seventy-seven thousand, five hundred ninety-one".