9878557512 has 64 divisors (see below), whose sum is σ = 24948792000. Its totient is φ = 3259263744.

The previous prime is 9878557471. The next prime is 9878557537. The reversal of 9878557512 is 2157558789.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4532439 + ... + 4534617.

It is an arithmetic number, because the mean of its divisors is an integer number (389824875).

Almost surely, 2^9878557512 is an apocalyptic number.

It is an amenable number.

9878557512 is an abundant number, since it is smaller than the sum of its proper divisors (15070234488).

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

9878557512 is a wasteful number, since it uses less digits than its factorization.

9878557512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4030 (or 4026 counting only the distinct ones).

The product of its digits is 7056000, while the sum is 57.

The square root of 9878557512 is about 99390.9327453969. The cubic root of 9878557512 is about 2145.6778149243.

The spelling of 9878557512 in words is "nine billion, eight hundred seventy-eight million, five hundred fifty-seven thousand, five hundred twelve".