64561423463 has 4 divisors (see below), whose sum is σ = 64620492648. Its totient is φ = 64502354280.

The previous prime is 64561423427. The next prime is 64561423477. The reversal of 64561423463 is 36432416546.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64561423463 - 2²² = 64557229159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64561425463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29532953 + ... + 29535138.

It is an arithmetic number, because the mean of its divisors is an integer number (16155123162).

Almost surely, 2^64561423463 is an apocalyptic number.

64561423463 is a deficient number, since it is larger than the sum of its proper divisors (59069185).

64561423463 is a wasteful number, since it uses less digits than its factorization.

64561423463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59069184.

The product of its digits is 1244160, while the sum is 44.

The spelling of 64561423463 in words is "sixty-four billion, five hundred sixty-one million, four hundred twenty-three thousand, four hundred sixty-three".