68564430993 has 32 divisors (see below), whose sum is σ = 95126676480. Its totient is φ = 43898137920.

The previous prime is 68564430989. The next prime is 68564431049. The reversal of 68564430993 is 39903446586.

68564430993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 68564430993 - 2² = 68564430989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68564430953) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1823380 + ... + 1860602.

It is an arithmetic number, because the mean of its divisors is an integer number (2972708640).

Almost surely, 2^68564430993 is an apocalyptic number.

It is an amenable number.

68564430993 is a deficient number, since it is larger than the sum of its proper divisors (26562245487).

68564430993 is a wasteful number, since it uses less digits than its factorization.

68564430993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37509.

The product of its (nonzero) digits is 16796160, while the sum is 57.

The spelling of 68564430993 in words is "sixty-eight billion, five hundred sixty-four million, four hundred thirty thousand, nine hundred ninety-three".