9729252855 has 48 divisors (see below), whose sum is σ = 19348340544. Its totient is φ = 4430315520.

The previous prime is 9729252737. The next prime is 9729252857. The reversal of 9729252855 is 5582529279.

It is a happy number.

9729252855 is a `hidden beast` number, since 97 + 29 + 2 + 528 + 5 + 5 = 666.

It is not a de Polignac number, because 9729252855 - 2²⁴ = 9712475639 is a prime.

It is a super-2 number, since 2×9729252855² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9729252857) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20865 + ... + 141045.

It is an arithmetic number, because the mean of its divisors is an integer number (403090428).

Almost surely, 2^9729252855 is an apocalyptic number.

9729252855 is a deficient number, since it is larger than the sum of its proper divisors (9619087689).

9729252855 is a wasteful number, since it uses less digits than its factorization.

9729252855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120456 (or 120453 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 54.

The square root of 9729252855 is about 98636.9750904801. The cubic root of 9729252855 is about 2134.8129575971.

The spelling of 9729252855 in words is "nine billion, seven hundred twenty-nine million, two hundred fifty-two thousand, eight hundred fifty-five".