64383561 has 48 divisors (see below), whose sum is σ = 105401088. Its totient is φ = 37536000.

The previous prime is 64383547. The next prime is 64383569. The reversal of 64383561 is 16538346.

64383561 is a `hidden beast` number, since 64 + 38 + 3 + 561 = 666.

It is not a de Polignac number, because 64383561 - 2⁷ = 64383433 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64383569) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 469885 + ... + 470021.

It is an arithmetic number, because the mean of its divisors is an integer number (2195856).

Almost surely, 2^64383561 is an apocalyptic number.

It is an amenable number.

64383561 is a deficient number, since it is larger than the sum of its proper divisors (41017527).

64383561 is a wasteful number, since it uses less digits than its factorization.

64383561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 299 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 64383561 is about 8023.9367519940. The cubic root of 64383561 is about 400.7974943668.

It can be divided in two parts, 6438 and 3561, that added together give a palindrome (9999).

The spelling of 64383561 in words is "sixty-four million, three hundred eighty-three thousand, five hundred sixty-one".