64040537088 has 704 divisors, whose sum is σ = 217892505600. Its totient is φ = 18409144320.

The previous prime is 64040537081. The next prime is 64040537111. The reversal of 64040537088 is 88073504046.

It is a tau number, because it is divible by the number of its divisors (704).

It is not an unprimeable number, because it can be changed into a prime (64040537081) 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, 771572695 + ... + 771572777.

It is an arithmetic number, because the mean of its divisors is an integer number (309506400).

Almost surely, 2^64040537088 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 64040537088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108946252800).

64040537088 is an abundant number, since it is smaller than the sum of its proper divisors (153851968512).

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

64040537088 is a wasteful number, since it uses less digits than its factorization.

64040537088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 64040537088 in words is "sixty-four billion, forty million, five hundred thirty-seven thousand, eighty-eight".