646411132127 has 4 divisors (see below), whose sum is σ = 680432770680. Its totient is φ = 612389493576.

The previous prime is 646411132123. The next prime is 646411132139. The reversal of 646411132127 is 721231114646.

646411132127 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 646411132127 - 2² = 646411132123 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 (646411132123) 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, 17010819248 + ... + 17010819285.

It is an arithmetic number, because the mean of its divisors is an integer number (170108192670).

Almost surely, 2^646411132127 is an apocalyptic number.

646411132127 is a deficient number, since it is larger than the sum of its proper divisors (34021638553).

646411132127 is a wasteful number, since it uses less digits than its factorization.

646411132127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34021638552.

The product of its digits is 48384, while the sum is 38.

The spelling of 646411132127 in words is "six hundred forty-six billion, four hundred eleven million, one hundred thirty-two thousand, one hundred twenty-seven".