64554642 has 24 divisors (see below), whose sum is σ = 140488140. Its totient is φ = 21422880.

The previous prime is 64554631. The next prime is 64554643. The reversal of 64554642 is 24645546.

64554642 is a `hidden beast` number, since 6 + 4 + 5 + 5 + 4 + 642 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 43678881 + 20875761 = 6609^2 + 4569^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64554597 and 64554606.

It is not an unprimeable number, because it can be changed into a prime (64554643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3709 + ... + 11952.

Almost surely, 2^64554642 is an apocalyptic number.

64554642 is an abundant number, since it is smaller than the sum of its proper divisors (75933498).

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

64554642 is a wasteful number, since it uses less digits than its factorization.

64554642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15898 (or 15895 counting only the distinct ones).

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

The square root of 64554642 is about 8034.5903442553. The cubic root of 64554642 is about 401.1521821707.

The spelling of 64554642 in words is "sixty-four million, five hundred fifty-four thousand, six hundred forty-two".