64987278946 has 16 divisors (see below), whose sum is σ = 97641237600. Its totient is φ = 32440232160.

The previous prime is 64987278931. The next prime is 64987278949.

It is a happy number.

64987278946 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (64987278949) 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, 5422741 + ... + 5434711.

It is an arithmetic number, because the mean of its divisors is an integer number (6102577350).

Almost surely, 2^64987278946 is an apocalyptic number.

64987278946 is a deficient number, since it is larger than the sum of its proper divisors (32653958654).

64987278946 is a wasteful number, since it uses less digits than its factorization.

64987278946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16209.

The product of its digits is 292626432, while the sum is 70.

The spelling of 64987278946 in words is "sixty-four billion, nine hundred eighty-seven million, two hundred seventy-eight thousand, nine hundred forty-six".