64980466994 has 4 divisors (see below), whose sum is σ = 97470700494. Its totient is φ = 32490233496.

The previous prime is 64980466981. The next prime is 64980467009. The reversal of 64980466994 is 49966408946.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 57972600625 + 7007866369 = 240775^2 + 83713^2 .

It is a super-2 number, since 2×64980466994² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64980466994.

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 as a sum of consecutive naturals, namely, 16245116747 + ... + 16245116750.

Almost surely, 2^64980466994 is an apocalyptic number.

64980466994 is a deficient number, since it is larger than the sum of its proper divisors (32490233500).

64980466994 is a wasteful number, since it uses less digits than its factorization.

64980466994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32490233499.

The product of its (nonzero) digits is 80621568, while the sum is 65.

The spelling of 64980466994 in words is "sixty-four billion, nine hundred eighty million, four hundred sixty-six thousand, nine hundred ninety-four".