646110151 has 4 divisors (see below), whose sum is σ = 647652600. Its totient is φ = 644567704.

The previous prime is 646110149. The next prime is 646110187. The reversal of 646110151 is 151011646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 646110151 - 2¹ = 646110149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646110851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770596 + ... + 771433.

It is an arithmetic number, because the mean of its divisors is an integer number (161913150).

Almost surely, 2^646110151 is an apocalyptic number.

646110151 is a deficient number, since it is larger than the sum of its proper divisors (1542449).

646110151 is a wasteful number, since it uses less digits than its factorization.

646110151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542448.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 646110151 is about 25418.6968784790. The cubic root of 646110151 is about 864.5076780116.

Adding to 646110151 its reverse (151011646), we get a palindrome (797121797).

The spelling of 646110151 in words is "six hundred forty-six million, one hundred ten thousand, one hundred fifty-one".