64041563620 has 96 divisors (see below), whose sum is σ = 142552327680. Its totient is φ = 24127434240.

The previous prime is 64041563603. The next prime is 64041563623. The reversal of 64041563620 is 2636514046.

It is a self number, because there is not a number n which added to its sum of digits gives 64041563620.

It is not an unprimeable number, because it can be changed into a prime (64041563623) 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, 8637715 + ... + 8645125.

It is an arithmetic number, because the mean of its divisors is an integer number (1484920080).

Almost surely, 2^64041563620 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 64041563620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71276163840).

64041563620 is an abundant number, since it is smaller than the sum of its proper divisors (78510764060).

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

64041563620 is a wasteful number, since it uses less digits than its factorization.

64041563620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7813 (or 7811 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 64041563620 in words is "sixty-four billion, forty-one million, five hundred sixty-three thousand, six hundred twenty".