2098732287661 has 4 divisors (see below), whose sum is σ = 2099133503424. Its totient is φ = 2098331071900.

The previous prime is 2098732287649. The next prime is 2098732287697. The reversal of 2098732287661 is 1667822378902.

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 2098732287661 - 2⁹ = 2098732287149 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 2098732287661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2098732287601) 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, 200600035 + ... + 200610496.

It is an arithmetic number, because the mean of its divisors is an integer number (524783375856).

Almost surely, 2^{2098732287661} is an apocalyptic number.

It is an amenable number.

2098732287661 is a deficient number, since it is larger than the sum of its proper divisors (401215763).

2098732287661 is an equidigital number, since it uses as much as digits as its factorization.

2098732287661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401215762.

The product of its (nonzero) digits is 24385536, while the sum is 61.

The spelling of 2098732287661 in words is "two trillion, ninety-eight billion, seven hundred thirty-two million, two hundred eighty-seven thousand, six hundred sixty-one".