64513431546 has 64 divisors (see below), whose sum is σ = 142403743872. Its totient is φ = 19398500352.

The previous prime is 64513431517. The next prime is 64513431601.

It is a happy number.

64513431546 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64513431498 and 64513431507.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125290 + ... + 380426.

It is an arithmetic number, because the mean of its divisors is an integer number (2225058498).

Almost surely, 2^64513431546 is an apocalyptic number.

64513431546 is an abundant number, since it is smaller than the sum of its proper divisors (77890312326).

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

64513431546 is a wasteful number, since it uses less digits than its factorization.

64513431546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255263.

The product of its digits is 518400, while the sum is 42.

The spelling of 64513431546 in words is "sixty-four billion, five hundred thirteen million, four hundred thirty-one thousand, five hundred forty-six".