9925749420 has 24 divisors (see below), whose sum is σ = 27792098544. Its totient is φ = 2646866496.

The previous prime is 9925749413. The next prime is 9925749433. The reversal of 9925749420 is 249475299.

It is a super-3 number, since 3×9925749420³ (a number of 31 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82714519 + ... + 82714638.

It is an arithmetic number, because the mean of its divisors is an integer number (1158004106).

Almost surely, 2^9925749420 is an apocalyptic number.

It is an amenable number.

9925749420 is an abundant number, since it is smaller than the sum of its proper divisors (17866349124).

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

9925749420 is a wasteful number, since it uses less digits than its factorization.

9925749420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165429169 (or 165429167 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 51.

The square root of 9925749420 is about 99628.0553860207. The cubic root of 9925749420 is about 2149.0891703455.

The spelling of 9925749420 in words is "nine billion, nine hundred twenty-five million, seven hundred forty-nine thousand, four hundred twenty".