65406775632 has 160 divisors (see below), whose sum is σ = 188861912064. Its totient is φ = 19338547200.

The previous prime is 65406775627. The next prime is 65406775633. The reversal of 65406775632 is 23657760456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65406775633) 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, 3627343 + ... + 3645329.

Almost surely, 2^65406775632 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 65406775632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94430956032).

65406775632 is an abundant number, since it is smaller than the sum of its proper divisors (123455136432).

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

65406775632 is a wasteful number, since it uses less digits than its factorization.

65406775632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18177 (or 18171 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 51.

The spelling of 65406775632 in words is "sixty-five billion, four hundred six million, seven hundred seventy-five thousand, six hundred thirty-two".