646118151 has 32 divisors (see below), whose sum is σ = 1022373888. Its totient is φ = 355173120.

The previous prime is 646118147. The next prime is 646118183. The reversal of 646118151 is 151811646.

646118151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 646118151 - 2² = 646118147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646118111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109755 + ... + 115491.

It is an arithmetic number, because the mean of its divisors is an integer number (31949184).

Almost surely, 2^646118151 is an apocalyptic number.

646118151 is a deficient number, since it is larger than the sum of its proper divisors (376255737).

646118151 is a wasteful number, since it uses less digits than its factorization.

646118151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5951.

The product of its digits is 5760, while the sum is 33.

The square root of 646118151 is about 25418.8542424713. The cubic root of 646118151 is about 864.5112460477.

Adding to 646118151 its reverse (151811646), we get a palindrome (797929797).

The spelling of 646118151 in words is "six hundred forty-six million, one hundred eighteen thousand, one hundred fifty-one".