64540404546 has 32 divisors (see below), whose sum is σ = 135070815168. Its totient is φ = 20537075520.

The previous prime is 64540404529. The next prime is 64540404589.

64540404546 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×64540404546² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64540404498 and 64540404507.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2730900 + ... + 2754431.

It is an arithmetic number, because the mean of its divisors is an integer number (4220962974).

Almost surely, 2^64540404546 is an apocalyptic number.

64540404546 is an abundant number, since it is smaller than the sum of its proper divisors (70530410622).

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

64540404546 is a wasteful number, since it uses less digits than its factorization.

64540404546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5485426.

The product of its (nonzero) digits is 921600, while the sum is 42.

The spelling of 64540404546 in words is "sixty-four billion, five hundred forty million, four hundred four thousand, five hundred forty-six".