2597661995 has 4 divisors (see below), whose sum is σ = 3117194400. Its totient is φ = 2078129592.

The previous prime is 2597661953. The next prime is 2597662009. The reversal of 2597661995 is 5991667952.

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 2597661995 - 2¹⁰ = 2597660971 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259766195 + ... + 259766204.

It is an arithmetic number, because the mean of its divisors is an integer number (779298600).

Almost surely, 2^2597661995 is an apocalyptic number.

2597661995 is a deficient number, since it is larger than the sum of its proper divisors (519532405).

2597661995 is an equidigital number, since it uses as much as digits as its factorization.

2597661995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519532404.

The product of its digits is 9185400, while the sum is 59.

The square root of 2597661995 is about 50967.2639544247. The cubic root of 2597661995 is about 1374.6565745073.

The spelling of 2597661995 in words is "two billion, five hundred ninety-seven million, six hundred sixty-one thousand, nine hundred ninety-five".