2115742566 has 64 divisors (see below), whose sum is σ = 4876485120. Its totient is φ = 599462400.

The previous prime is 2115742543. The next prime is 2115742571. The reversal of 2115742566 is 6652475112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4530265 + ... + 4530731.

It is an arithmetic number, because the mean of its divisors is an integer number (76195080).

Almost surely, 2^2115742566 is an apocalyptic number.

2115742566 is an abundant number, since it is smaller than the sum of its proper divisors (2760742554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2115742566 is a wasteful number, since it uses less digits than its factorization.

2115742566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149.

The product of its digits is 100800, while the sum is 39.

The square root of 2115742566 is about 45997.2017192351. The cubic root of 2115742566 is about 1283.7711388861.

The spelling of 2115742566 in words is "two billion, one hundred fifteen million, seven hundred forty-two thousand, five hundred sixty-six".