64378887346 has 8 divisors (see below), whose sum is σ = 97454279340. Its totient is φ = 31894127568.

The previous prime is 64378887301. The next prime is 64378887359.

64378887346 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 62437515625 + 1941371721 = 249875^2 + 44061^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×64378887346² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147657781 + ... + 147658216.

Almost surely, 2^64378887346 is an apocalyptic number.

64378887346 is a deficient number, since it is larger than the sum of its proper divisors (33075391994).

64378887346 is a wasteful number, since it uses less digits than its factorization.

64378887346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295316108.

The product of its digits is 130056192, while the sum is 64.

The spelling of 64378887346 in words is "sixty-four billion, three hundred seventy-eight million, eight hundred eighty-seven thousand, three hundred forty-six".