646122610 has 32 divisors (see below), whose sum is σ = 1375004160. Its totient is φ = 213888192.

The previous prime is 646122571. The next prime is 646122613. The reversal of 646122610 is 16221646.

It is not an unprimeable number, because it can be changed into a prime (646122613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157114 + ... + 161173.

It is an arithmetic number, because the mean of its divisors is an integer number (42968880).

Almost surely, 2^646122610 is an apocalyptic number.

646122610 is an abundant number, since it is smaller than the sum of its proper divisors (728881550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646122610 is a wasteful number, since it uses less digits than its factorization.

646122610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318330.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 646122610 is about 25418.9419528036. The cubic root of 646122610 is about 864.5132347690.

It can be divided in two parts, 646 and 122610, that added together give a triangular number (123256 = T₄₉₆).

The spelling of 646122610 in words is "six hundred forty-six million, one hundred twenty-two thousand, six hundred ten".