2113665506 has 16 divisors (see below), whose sum is σ = 3218072928. Its totient is φ = 1041012000.

The previous prime is 2113665503. The next prime is 2113665509. The reversal of 2113665506 is 6055663112.

It is an interprime number because it is at equal distance from previous prime (2113665503) and next prime (2113665509).

It is not an unprimeable number, because it can be changed into a prime (2113665503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109481 + ... + 127331.

It is an arithmetic number, because the mean of its divisors is an integer number (201129558).

Almost surely, 2^2113665506 is an apocalyptic number.

2113665506 is a deficient number, since it is larger than the sum of its proper divisors (1104407422).

2113665506 is a wasteful number, since it uses less digits than its factorization.

2113665506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18737.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 2113665506 is about 45974.6180625788. The cubic root of 2113665506 is about 1283.3509014443.

The spelling of 2113665506 in words is "two billion, one hundred thirteen million, six hundred sixty-five thousand, five hundred six".