646125142160 has 40 divisors (see below), whose sum is σ = 1542842069496. Its totient is φ = 251464919040.

The previous prime is 646125142111. The next prime is 646125142163. The reversal of 646125142160 is 61241521646.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 24222564496 + 621902577664 = 155636^2 + 788608^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (646125142163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109139801 + ... + 109145720.

Almost surely, 2^646125142160 is an apocalyptic number.

It is an amenable number.

646125142160 is an abundant number, since it is smaller than the sum of its proper divisors (896716927336).

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

646125142160 is a wasteful number, since it uses less digits than its factorization.

646125142160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218285571 (or 218285565 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 646125142160 in words is "six hundred forty-six billion, one hundred twenty-five million, one hundred forty-two thousand, one hundred sixty".