646293416 has 16 divisors (see below), whose sum is σ = 1212071040. Its totient is φ = 323074480.

The previous prime is 646293413. The next prime is 646293419. The reversal of 646293416 is 614392646.

It is an interprime number because it is at equal distance from previous prime (646293413) and next prime (646293419).

It is a super-3 number, since 3×646293416³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (646293413) 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, 60425 + ... + 70311.

It is an arithmetic number, because the mean of its divisors is an integer number (75754440).

Almost surely, 2^646293416 is an apocalyptic number.

It is an amenable number.

646293416 is a deficient number, since it is larger than the sum of its proper divisors (565777624).

646293416 is a wasteful number, since it uses less digits than its factorization.

646293416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18064 (or 18060 counting only the distinct ones).

The product of its digits is 186624, while the sum is 41.

The square root of 646293416 is about 25422.3015480503. The cubic root of 646293416 is about 864.5894076373.

The spelling of 646293416 in words is "six hundred forty-six million, two hundred ninety-three thousand, four hundred sixteen".