2091326655 has 64 divisors (see below), whose sum is σ = 3919850496. Its totient is φ = 940800000.

The previous prime is 2091326641. The next prime is 2091326687. The reversal of 2091326655 is 5566231902.

It is not a de Polignac number, because 2091326655 - 2⁶ = 2091326591 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 193905 + ... + 204405.

It is an arithmetic number, because the mean of its divisors is an integer number (61247664).

Almost surely, 2^2091326655 is an apocalyptic number.

2091326655 is a deficient number, since it is larger than the sum of its proper divisors (1828523841).

2091326655 is a wasteful number, since it uses less digits than its factorization.

2091326655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10608.

The product of its (nonzero) digits is 97200, while the sum is 39.

The square root of 2091326655 is about 45731.0250814477. The cubic root of 2091326655 is about 1278.8137314645.

The spelling of 2091326655 in words is "two billion, ninety-one million, three hundred twenty-six thousand, six hundred fifty-five".