646646080626 has 192 divisors, whose sum is σ = 1836591714048. Its totient is φ = 165934303488.

The previous prime is 646646080453. The next prime is 646646080637. The reversal of 646646080626 is 626080646646.

646646080626 is a `hidden beast` number, since 6 + 4 + 6 + 6 + 4 + 6 + 0 + 8 + 0 + 626 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1438776 + ... + 1833948.

It is an arithmetic number, because the mean of its divisors is an integer number (9565581844).

Almost surely, 2^646646080626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646646080626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (918295857024).

646646080626 is an abundant number, since it is smaller than the sum of its proper divisors (1189945633422).

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

646646080626 is a wasteful number, since it uses less digits than its factorization.

646646080626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395247 (or 395235 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 54.

The spelling of 646646080626 in words is "six hundred forty-six billion, six hundred forty-six million, eighty thousand, six hundred twenty-six".