64969433893 has 16 divisors (see below), whose sum is σ = 80037301120. Its totient is φ = 51356223936.

The previous prime is 64969433873. The next prime is 64969433917. The reversal of 64969433893 is 39833496946.

64969433893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 64969433893 - 2¹³ = 64969425701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64969433873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236655 + ... + 431212.

It is an arithmetic number, because the mean of its divisors is an integer number (5002331320).

Almost surely, 2^64969433893 is an apocalyptic number.

It is an amenable number.

64969433893 is a deficient number, since it is larger than the sum of its proper divisors (15067867227).

64969433893 is a wasteful number, since it uses less digits than its factorization.

64969433893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668956.

The product of its digits is 90699264, while the sum is 64.

The spelling of 64969433893 in words is "sixty-four billion, nine hundred sixty-nine million, four hundred thirty-three thousand, eight hundred ninety-three".