646510652 has 6 divisors (see below), whose sum is σ = 1131393648. Its totient is φ = 323255324.

The previous prime is 646510651. The next prime is 646510679. The reversal of 646510652 is 256015646.

It is a super-3 number, since 3×646510652³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646510651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80813828 + ... + 80813835.

It is an arithmetic number, because the mean of its divisors is an integer number (188565608).

Almost surely, 2^646510652 is an apocalyptic number.

It is an amenable number.

646510652 is a deficient number, since it is larger than the sum of its proper divisors (484882996).

646510652 is a wasteful number, since it uses less digits than its factorization.

646510652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161627667 (or 161627665 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 646510652 is about 25426.5737369391. The cubic root of 646510652 is about 864.6862671030.

The spelling of 646510652 in words is "six hundred forty-six million, five hundred ten thousand, six hundred fifty-two".