65622172032 has 640 divisors, whose sum is σ = 215481446400. Its totient is φ = 19752284160.

The previous prime is 65622171997. The next prime is 65622172043. The reversal of 65622172032 is 23027122656.

65622172032 is a `hidden beast` number, since 6 + 5 + 622 + 1 + 7 + 20 + 3 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 516709953 + ... + 516710079.

It is an arithmetic number, because the mean of its divisors is an integer number (336689760).

Almost surely, 2^65622172032 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 65622172032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107740723200).

65622172032 is an abundant number, since it is smaller than the sum of its proper divisors (149859274368).

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

65622172032 is a wasteful number, since it uses less digits than its factorization.

65622172032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

Adding to 65622172032 its reverse (23027122656), we get a palindrome (88649294688).

The spelling of 65622172032 in words is "sixty-five billion, six hundred twenty-two million, one hundred seventy-two thousand, thirty-two".