2641187997 has 12 divisors (see below), whose sum is σ = 4360056480. Its totient is φ = 1509250248.

The previous prime is 2641187971. The next prime is 2641188013. The reversal of 2641187997 is 7997811462.

It is not a de Polignac number, because 2641187997 - 2¹⁰ = 2641186973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2641187917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20961747 + ... + 20961872.

It is an arithmetic number, because the mean of its divisors is an integer number (363338040).

Almost surely, 2^2641187997 is an apocalyptic number.

It is an amenable number.

2641187997 is a deficient number, since it is larger than the sum of its proper divisors (1718868483).

2641187997 is a wasteful number, since it uses less digits than its factorization.

2641187997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41923632 (or 41923629 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 2641187997 is about 51392.4896945069. The cubic root of 2641187997 is about 1382.2919270866.

The spelling of 2641187997 in words is "two billion, six hundred forty-one million, one hundred eighty-seven thousand, nine hundred ninety-seven".