64556041563 has 12 divisors (see below), whose sum is σ = 100420509280. Its totient is φ = 39726794736.

The previous prime is 64556041549. The next prime is 64556041567. The reversal of 64556041563 is 36514065546.

64556041563 is a `hidden beast` number, since 6 + 4 + 556 + 0 + 41 + 56 + 3 = 666.

It is not a de Polignac number, because 64556041563 - 2¹² = 64556037467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64556041567) 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, 275880403 + ... + 275880636.

Almost surely, 2^64556041563 is an apocalyptic number.

64556041563 is a deficient number, since it is larger than the sum of its proper divisors (35864467717).

64556041563 is a wasteful number, since it uses less digits than its factorization.

64556041563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551761058 (or 551761055 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 64556041563 in words is "sixty-four billion, five hundred fifty-six million, forty-one thousand, five hundred sixty-three".