4991151855 has 16 divisors (see below), whose sum is σ = 8063377920. Its totient is φ = 2636102688.

The previous prime is 4991151829. The next prime is 4991151863. The reversal of 4991151855 is 5581511994.

It is a happy number.

It is not a de Polignac number, because 4991151855 - 2⁶ = 4991151791 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1613715 + ... + 1616804.

It is an arithmetic number, because the mean of its divisors is an integer number (503961120).

Almost surely, 2^4991151855 is an apocalyptic number.

4991151855 is a deficient number, since it is larger than the sum of its proper divisors (3072226065).

4991151855 is a wasteful number, since it uses less digits than its factorization.

4991151855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3230630.

The product of its digits is 324000, while the sum is 48.

The square root of 4991151855 is about 70648.0845812539. The cubic root of 4991151855 is about 1708.9666767564.

The spelling of 4991151855 in words is "four billion, nine hundred ninety-one million, one hundred fifty-one thousand, eight hundred fifty-five".