646125254144 has 40 divisors (see below), whose sum is σ = 1303770714048. Its totient is φ = 319863961600.

The previous prime is 646125254129. The next prime is 646125254149. The reversal of 646125254144 is 441452521646.

It is a junction number, because it is equal to n+sod(n) for n = 646125254095 and 646125254104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646125254149) 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, 6195632 + ... + 6299055.

Almost surely, 2^646125254144 is an apocalyptic number.

646125254144 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

646125254144 is an abundant number, since it is smaller than the sum of its proper divisors (657645459904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646125254144 is a wasteful number, since it uses less digits than its factorization.

646125254144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12494806 (or 12494790 counting only the distinct ones).

The product of its digits is 921600, while the sum is 44.

The spelling of 646125254144 in words is "six hundred forty-six billion, one hundred twenty-five million, two hundred fifty-four thousand, one hundred forty-four".