64455642 has 64 divisors (see below), whose sum is σ = 147692160. Its totient is φ = 20829312.

The previous prime is 64455617. The next prime is 64455673. The reversal of 64455642 is 24655446.

64455642 is a `hidden beast` number, since 6 + 4 + 4 + 5 + 5 + 642 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 64455597 and 64455606.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 327088 + ... + 327284.

It is an arithmetic number, because the mean of its divisors is an integer number (2307690).

Almost surely, 2^64455642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64455642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73846080).

64455642 is an abundant number, since it is smaller than the sum of its proper divisors (83236518).

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

64455642 is a wasteful number, since it uses less digits than its factorization.

64455642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 358 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

The square root of 64455642 is about 8028.4271186827. The cubic root of 64455642 is about 400.9470103259.

The spelling of 64455642 in words is "sixty-four million, four hundred fifty-five thousand, six hundred forty-two".