64611777188608 has 144 divisors (see below), whose sum is σ = 146280207404800. Its totient is φ = 28236216176640.

The previous prime is 64611777188593. The next prime is 64611777188639. The reversal of 64611777188608 is 80688177711646.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118541023 + ... + 119084833.

Almost surely, 2^{64611777188608} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64611777188608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73140103702400).

64611777188608 is an abundant number, since it is smaller than the sum of its proper divisors (81668430216192).

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

64611777188608 is a wasteful number, since it uses less digits than its factorization.

64611777188608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545738 (or 545724 counting only the distinct ones).

The product of its (nonzero) digits is 151732224, while the sum is 70.

The spelling of 64611777188608 in words is "sixty-four trillion, six hundred eleven billion, seven hundred seventy-seven million, one hundred eighty-eight thousand, six hundred eight".