2656165642 has 16 divisors (see below), whose sum is σ = 4390515360. Its totient is φ = 1197412272.

The previous prime is 2656165609. The next prime is 2656165669. The reversal of 2656165642 is 2465616562.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1186792 + ... + 1189027.

It is an arithmetic number, because the mean of its divisors is an integer number (274407210).

Almost surely, 2^2656165642 is an apocalyptic number.

2656165642 is a deficient number, since it is larger than the sum of its proper divisors (1734349718).

2656165642 is a wasteful number, since it uses less digits than its factorization.

2656165642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375877.

The product of its digits is 518400, while the sum is 43.

The square root of 2656165642 is about 51538.0019209127. The cubic root of 2656165642 is about 1384.8999031866.

The spelling of 2656165642 in words is "two billion, six hundred fifty-six million, one hundred sixty-five thousand, six hundred forty-two".