9881499812 has 6 divisors (see below), whose sum is σ = 17292624678. Its totient is φ = 4940749904.

The previous prime is 9881499811. The next prime is 9881499863. The reversal of 9881499812 is 2189941889.

It can be written as a sum of positive squares in only one way, i.e., 7829772196 + 2051727616 = 88486^2 + 45296^2 .

It is not an unprimeable number, because it can be changed into a prime (9881499811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1235187473 + ... + 1235187480.

It is an arithmetic number, because the mean of its divisors is an integer number (2882104113).

Almost surely, 2^9881499812 is an apocalyptic number.

It is an amenable number.

9881499812 is a deficient number, since it is larger than the sum of its proper divisors (7411124866).

9881499812 is a wasteful number, since it uses less digits than its factorization.

9881499812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2470374957 (or 2470374955 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 59.

The square root of 9881499812 is about 99405.7332954191. The cubic root of 9881499812 is about 2145.8908217707.

The spelling of 9881499812 in words is "nine billion, eight hundred eighty-one million, four hundred ninety-nine thousand, eight hundred twelve".