64561016546 has 16 divisors (see below), whose sum is σ = 104361070464. Its totient is φ = 29777335824.

The previous prime is 64561016539. The next prime is 64561016549.

64561016546 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 64561016497 and 64561016506.

It is not an unprimeable number, because it can be changed into a prime (64561016549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 796280 + ... + 873603.

It is an arithmetic number, because the mean of its divisors is an integer number (6522566904).

Almost surely, 2^64561016546 is an apocalyptic number.

64561016546 is a deficient number, since it is larger than the sum of its proper divisors (39800053918).

64561016546 is a wasteful number, since it uses less digits than its factorization.

64561016546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671385.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 64561016546 in words is "sixty-four billion, five hundred sixty-one million, sixteen thousand, five hundred forty-six".