23171272777728 has 896 divisors, whose sum is σ = 73605542400000. Its totient is φ = 7182987558912.

The previous prime is 23171272777711. The next prime is 23171272777769. The reversal of 23171272777728 is 82777727217132.

23171272777728 is a `hidden beast` number, since 2 + 317 + 1 + 27 + 277 + 7 + 7 + 28 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 86138560378 + ... + 86138560646.

Almost surely, 2^{23171272777728} 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 23171272777728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36802771200000).

23171272777728 is an abundant number, since it is smaller than the sum of its proper divisors (50434269622272).

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

23171272777728 is a wasteful number, since it uses less digits than its factorization.

23171272777728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625 (or 595 counting only the distinct ones).

The product of its digits is 45177216, while the sum is 63.

The spelling of 23171272777728 in words is "twenty-three trillion, one hundred seventy-one billion, two hundred seventy-two million, seven hundred seventy-seven thousand, seven hundred twenty-eight".