2115664042 has 32 divisors (see below), whose sum is σ = 3463617024. Its totient is φ = 965260800.

The previous prime is 2115664021. The next prime is 2115664043. The reversal of 2115664042 is 2404665112.

It is a happy number.

It is a super-2 number, since 2×2115664042² = 8952068677223555528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2115663995 and 2115664013.

It is not an unprimeable number, because it can be changed into a prime (2115664043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222567 + ... + 231877.

It is an arithmetic number, because the mean of its divisors is an integer number (108238032).

Almost surely, 2^2115664042 is an apocalyptic number.

2115664042 is a deficient number, since it is larger than the sum of its proper divisors (1347952982).

2115664042 is a wasteful number, since it uses less digits than its factorization.

2115664042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9534.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 2115664042 is about 45996.3481376511. The cubic root of 2115664042 is about 1283.7552566621.

The spelling of 2115664042 in words is "two billion, one hundred fifteen million, six hundred sixty-four thousand, forty-two".