64646422624242 has 32 divisors (see below), whose sum is σ = 147541384972800. Its totient is φ = 20966407336944.

The previous prime is 64646422624237. The next prime is 64646422624249. The reversal of 64646422624242 is 24242622464646.

64646422624242 is a `hidden beast` number, since 6 + 4 + 6 + 4 + 6 + 4 + 2 + 2 + 624 + 2 + 4 + 2 = 666.

It is a super-2 number, since 2×64646422624242² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (64646422624249) 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, 16177781442 + ... + 16177785437.

It is an arithmetic number, because the mean of its divisors is an integer number (4610668280400).

Almost surely, 2^{64646422624242} is an apocalyptic number.

64646422624242 is an abundant number, since it is smaller than the sum of its proper divisors (82894962348558).

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

64646422624242 is a wasteful number, since it uses less digits than its factorization.

64646422624242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32355566927 (or 32355566921 counting only the distinct ones).

The product of its digits is 42467328, while the sum is 54.

The spelling of 64646422624242 in words is "sixty-four trillion, six hundred forty-six billion, four hundred twenty-two million, six hundred twenty-four thousand, two hundred forty-two".