64997736458 has 8 divisors (see below), whose sum is σ = 99336163428. Its totient is φ = 31885681984.

The previous prime is 64997736413. The next prime is 64997736469. The reversal of 64997736458 is 85463779946.

It can be written as a sum of positive squares in 2 ways, for example, as 60291364849 + 4706371609 = 245543^2 + 68603^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306592991 + ... + 306593202.

Almost surely, 2^64997736458 is an apocalyptic number.

64997736458 is a deficient number, since it is larger than the sum of its proper divisors (34338426970).

64997736458 is a wasteful number, since it uses less digits than its factorization.

64997736458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613186248.

The product of its digits is 274337280, while the sum is 68.

The spelling of 64997736458 in words is "sixty-four billion, nine hundred ninety-seven million, seven hundred thirty-six thousand, four hundred fifty-eight".