64810968558 has 128 divisors (see below), whose sum is σ = 151713644544. Its totient is φ = 18077904000.

The previous prime is 64810968557. The next prime is 64810968581. The reversal of 64810968558 is 85586901846.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64810968557) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 123921285 + ... + 123921807.

It is an arithmetic number, because the mean of its divisors is an integer number (1185262848).

Almost surely, 2^64810968558 is an apocalyptic number.

64810968558 is an abundant number, since it is smaller than the sum of its proper divisors (86902675986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64810968558 is a wasteful number, since it uses less digits than its factorization.

64810968558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990.

The product of its (nonzero) digits is 16588800, while the sum is 60.

The spelling of 64810968558 in words is "sixty-four billion, eight hundred ten million, nine hundred sixty-eight thousand, five hundred fifty-eight".