9115531980 has 24 divisors (see below), whose sum is σ = 25523489712. Its totient is φ = 2430808512.

The previous prime is 9115531969. The next prime is 9115531991. The reversal of 9115531980 is 891355119.

It is an interprime number because it is at equal distance from previous prime (9115531969) and next prime (9115531991).

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, 75962707 + ... + 75962826.

It is an arithmetic number, because the mean of its divisors is an integer number (1063478738).

Almost surely, 2^9115531980 is an apocalyptic number.

It is an amenable number.

9115531980 is an abundant number, since it is smaller than the sum of its proper divisors (16407957732).

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

9115531980 is a wasteful number, since it uses less digits than its factorization.

9115531980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151925545 (or 151925543 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 42.

The square root of 9115531980 is about 95475.2951291589. The cubic root of 9115531980 is about 2088.9466071250.

The spelling of 9115531980 in words is "nine billion, one hundred fifteen million, five hundred thirty-one thousand, nine hundred eighty".