9915540920 has 16 divisors (see below), whose sum is σ = 22309967160. Its totient is φ = 3966216352.

The previous prime is 9915540893. The next prime is 9915540923. The reversal of 9915540920 is 290455199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9915540923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123944222 + ... + 123944301.

Almost surely, 2^9915540920 is an apocalyptic number.

It is an amenable number.

9915540920 is an abundant number, since it is smaller than the sum of its proper divisors (12394426240).

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

9915540920 is a wasteful number, since it uses less digits than its factorization.

9915540920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247888534 (or 247888530 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 44.

The square root of 9915540920 is about 99576.8091475119. The cubic root of 9915540920 is about 2148.3521478303.

The spelling of 9915540920 in words is "nine billion, nine hundred fifteen million, five hundred forty thousand, nine hundred twenty".