646836741 has 24 divisors (see below), whose sum is σ = 999633440. Its totient is φ = 401824800.

The previous prime is 646836733. The next prime is 646836761. The reversal of 646836741 is 147638646.

It is a happy number.

It is not a de Polignac number, because 646836741 - 2³ = 646836733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646836761) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20575 + ... + 41436.

Almost surely, 2^646836741 is an apocalyptic number.

646836741 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

646836741 is a deficient number, since it is larger than the sum of its proper divisors (352796699).

646836741 is a wasteful number, since it uses less digits than its factorization.

646836741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62097 (or 62094 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 646836741 is about 25432.9852946916. The cubic root of 646836741 is about 864.8316203602.

The spelling of 646836741 in words is "six hundred forty-six million, eight hundred thirty-six thousand, seven hundred forty-one".