2641920091 has 4 divisors (see below), whose sum is σ = 2666158000. Its totient is φ = 2617682184.

The previous prime is 2641920089. The next prime is 2641920103. The reversal of 2641920091 is 1900291462.

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 2641920091 - 2¹ = 2641920089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2641920791) 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, 12118791 + ... + 12119008.

It is an arithmetic number, because the mean of its divisors is an integer number (666539500).

Almost surely, 2^2641920091 is an apocalyptic number.

2641920091 is a deficient number, since it is larger than the sum of its proper divisors (24237909).

2641920091 is a wasteful number, since it uses less digits than its factorization.

2641920091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24237908.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 2641920091 is about 51399.6117786895. The cubic root of 2641920091 is about 1382.4196315062.

The spelling of 2641920091 in words is "two billion, six hundred forty-one million, nine hundred twenty thousand, ninety-one".