646168941 has 32 divisors (see below), whose sum is σ = 1059056640. Its totient is φ = 386089200.

The previous prime is 646168933. The next prime is 646168949. The reversal of 646168941 is 149861646.

It is an interprime number because it is at equal distance from previous prime (646168933) and next prime (646168949).

It is not a de Polignac number, because 646168941 - 2³ = 646168933 is a prime.

It is a super-2 number, since 2×646168941² = 835068600626122962, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646168949) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5766 + ... + 36408.

It is an arithmetic number, because the mean of its divisors is an integer number (33095520).

Almost surely, 2^646168941 is an apocalyptic number.

It is an amenable number.

646168941 is a deficient number, since it is larger than the sum of its proper divisors (412887699).

646168941 is a wasteful number, since it uses less digits than its factorization.

646168941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30734 (or 30728 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 646168941 is about 25419.8532843917. The cubic root of 646168941 is about 864.5338979293.

The spelling of 646168941 in words is "six hundred forty-six million, one hundred sixty-eight thousand, nine hundred forty-one".