64642002 has 24 divisors (see below), whose sum is σ = 131541648. Its totient is φ = 21172800.

The previous prime is 64641979. The next prime is 64642013. The reversal of 64642002 is 20024646.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161002 + ... + 161402.

It is an arithmetic number, because the mean of its divisors is an integer number (5480902).

Almost surely, 2^64642002 is an apocalyptic number.

64642002 is an abundant number, since it is smaller than the sum of its proper divisors (66899646).

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

64642002 is an equidigital number, since it uses as much as digits as its factorization.

64642002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 64642002 is about 8040.0249999611. The cubic root of 64642002 is about 401.3330566315. Note that the first 3 decimals are identical.

Adding to 64642002 its reverse (20024646), we get a palindrome (84666648).

The spelling of 64642002 in words is "sixty-four million, six hundred forty-two thousand, two".