646607610 has 160 divisors (see below), whose sum is σ = 1958736384. Its totient is φ = 151632000.

The previous prime is 646607587. The next prime is 646607657. The reversal of 646607610 is 16706646.

646607610 is a `hidden beast` number, since 6 + 46 + 607 + 6 + 1 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 275040 + ... + 277380.

Almost surely, 2^646607610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646607610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (979368192).

646607610 is an abundant number, since it is smaller than the sum of its proper divisors (1312128774).

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

646607610 is a wasteful number, since it uses less digits than its factorization.

646607610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2402 (or 2393 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 646607610 is about 25428.4802927741. The cubic root of 646607610 is about 864.7294909643.

The spelling of 646607610 in words is "six hundred forty-six million, six hundred seven thousand, six hundred ten".