64802979445 has 4 divisors (see below), whose sum is σ = 77763575340. Its totient is φ = 51842383552.

The previous prime is 64802979427. The next prime is 64802979509. The reversal of 64802979445 is 54497920846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54497920846 = 2 ⋅27248960423.

It can be written as a sum of positive squares in 2 ways, for example, as 26475520369 + 38327459076 = 162713^2 + 195774^2 .

It is a cyclic number.

It is not a de Polignac number, because 64802979445 - 2¹⁷ = 64802848373 is a prime.

It is a super-2 number, since 2×64802979445² (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 64802979445.

It is a congruent number.

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, 6480297940 + ... + 6480297949.

It is an arithmetic number, because the mean of its divisors is an integer number (19440893835).

Almost surely, 2^64802979445 is an apocalyptic number.

It is an amenable number.

64802979445 is a deficient number, since it is larger than the sum of its proper divisors (12960595895).

64802979445 is a wasteful number, since it uses less digits than its factorization.

64802979445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12960595894.

The product of its (nonzero) digits is 17418240, while the sum is 58.

The spelling of 64802979445 in words is "sixty-four billion, eight hundred two million, nine hundred seventy-nine thousand, four hundred forty-five".