64690963645 has 64 divisors (see below), whose sum is σ = 99399776256. Its totient is φ = 39244020480.

The previous prime is 64690963633. The next prime is 64690963663. The reversal of 64690963645 is 54636909646.

It is not a de Polignac number, because 64690963645 - 2¹¹ = 64690961597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64690963645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4578682 + ... + 4592788.

It is an arithmetic number, because the mean of its divisors is an integer number (1553121504).

Almost surely, 2^64690963645 is an apocalyptic number.

It is an amenable number.

64690963645 is a deficient number, since it is larger than the sum of its proper divisors (34708812611).

64690963645 is a wasteful number, since it uses less digits than its factorization.

64690963645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14450.

The product of its (nonzero) digits is 25194240, while the sum is 58.

The spelling of 64690963645 in words is "sixty-four billion, six hundred ninety million, nine hundred sixty-three thousand, six hundred forty-five".