646072063 has 32 divisors (see below), whose sum is σ = 871032960. Its totient is φ = 464486400.

The previous prime is 646072051. The next prime is 646072087. The reversal of 646072063 is 360270646.

It is a de Polignac number, because none of the positive numbers 2^k-646072063 is a prime.

It is a super-2 number, since 2×646072063² = 834818221178151938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646072003) 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, 37663 + ... + 52063.

It is an arithmetic number, because the mean of its divisors is an integer number (27219780).

Almost surely, 2^646072063 is an apocalyptic number.

646072063 is a deficient number, since it is larger than the sum of its proper divisors (224960897).

646072063 is a wasteful number, since it uses less digits than its factorization.

646072063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14467.

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 646072063 is about 25417.9476551511. The cubic root of 646072063 is about 864.4906901882.

The spelling of 646072063 in words is "six hundred forty-six million, seventy-two thousand, sixty-three".