646118148 has 96 divisors (see below), whose sum is σ = 1659571200. Its totient is φ = 194454144.

The previous prime is 646118147. The next prime is 646118183. The reversal of 646118148 is 841811646.

It is a super-2 number, since 2×646118148² = 834937322349899808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (646118147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1799593 + ... + 1799951.

It is an arithmetic number, because the mean of its divisors is an integer number (17287200).

Almost surely, 2^646118148 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 646118148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (829785600).

646118148 is an abundant number, since it is smaller than the sum of its proper divisors (1013453052).

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

646118148 is a wasteful number, since it uses less digits than its factorization.

646118148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601 (or 599 counting only the distinct ones).

The product of its digits is 36864, while the sum is 39.

The square root of 646118148 is about 25418.8541834600. The cubic root of 646118148 is about 864.5112447097.

The spelling of 646118148 in words is "six hundred forty-six million, one hundred eighteen thousand, one hundred forty-eight".