64556442 has 12 divisors (see below), whose sum is σ = 139872330. Its totient is φ = 21518808.

The previous prime is 64556413. The next prime is 64556461. The reversal of 64556442 is 24465546.

64556442 is a `hidden beast` number, since 6 + 4 + 5 + 5 + 644 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 62869041 + 1687401 = 7929^2 + 1299^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64556397 and 64556406.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1793217 + ... + 1793252.

Almost surely, 2^64556442 is an apocalyptic number.

64556442 is an abundant number, since it is smaller than the sum of its proper divisors (75315888).

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

64556442 is a wasteful number, since it uses less digits than its factorization.

64556442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3586477 (or 3586474 counting only the distinct ones).

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

The square root of 64556442 is about 8034.7023591419. The cubic root of 64556442 is about 401.1559106256.

The spelling of 64556442 in words is "sixty-four million, five hundred fifty-six thousand, four hundred forty-two".