6642093855 has 16 divisors (see below), whose sum is σ = 10654128864. Its totient is φ = 3533523840.

The previous prime is 6642093797. The next prime is 6642093859. The reversal of 6642093855 is 5583902466.

It is not a de Polignac number, because 6642093855 - 2⁶ = 6642093791 is a prime.

It is a super-2 number, since 2×6642093855² = 88234821557257522050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642093859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 551736 + ... + 563645.

It is an arithmetic number, because the mean of its divisors is an integer number (665883054).

Almost surely, 2^6642093855 is an apocalyptic number.

6642093855 is a deficient number, since it is larger than the sum of its proper divisors (4012035009).

6642093855 is a wasteful number, since it uses less digits than its factorization.

6642093855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115786.

The product of its (nonzero) digits is 1555200, while the sum is 48.

The square root of 6642093855 is about 81499.0420495849. The cubic root of 6642093855 is about 1879.7568207227.

The spelling of 6642093855 in words is "six billion, six hundred forty-two million, ninety-three thousand, eight hundred fifty-five".