9864429725 has 24 divisors (see below), whose sum is σ = 12400158720. Its totient is φ = 7783715520.

The previous prime is 9864429719. The next prime is 9864429737. The reversal of 9864429725 is 5279244689.

It is a happy number.

It is not a de Polignac number, because 9864429725 - 2⁶ = 9864429661 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 540296 + ... + 558254.

It is an arithmetic number, because the mean of its divisors is an integer number (516673280).

Almost surely, 2^9864429725 is an apocalyptic number.

It is an amenable number.

9864429725 is a deficient number, since it is larger than the sum of its proper divisors (2535728995).

9864429725 is a wasteful number, since it uses less digits than its factorization.

9864429725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18269 (or 18264 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 56.

The square root of 9864429725 is about 99319.8355063076. The cubic root of 9864429725 is about 2144.6544488577.

The spelling of 9864429725 in words is "nine billion, eight hundred sixty-four million, four hundred twenty-nine thousand, seven hundred twenty-five".