646361120 has 48 divisors (see below), whose sum is σ = 1538066880. Its totient is φ = 256675584.

The previous prime is 646361119. The next prime is 646361123. The reversal of 646361120 is 21163646.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (646361123) 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, 7709 + ... + 36771.

It is an arithmetic number, because the mean of its divisors is an integer number (32043060).

Almost surely, 2^646361120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646361120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (769033440).

646361120 is an abundant number, since it is smaller than the sum of its proper divisors (891705760).

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

646361120 is a wasteful number, since it uses less digits than its factorization.

646361120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29217 (or 29209 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 646361120 is about 25423.6330999328. The cubic root of 646361120 is about 864.6195972880.

It can be divided in two parts, 64636 and 1120, that added together give a palindrome (65756).

The spelling of 646361120 in words is "six hundred forty-six million, three hundred sixty-one thousand, one hundred twenty".