9998749476 has 18 divisors (see below), whose sum is σ = 25274616822. Its totient is φ = 3332916480.

The previous prime is 9998749469. The next prime is 9998749477. The reversal of 9998749476 is 6749478999.

It can be written as a sum of positive squares in only one way, i.e., 9134389476 + 864360000 = 95574^2 + 29400^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (9998749477) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138871485 + ... + 138871556.

It is an arithmetic number, because the mean of its divisors is an integer number (1404145379).

Almost surely, 2^9998749476 is an apocalyptic number.

It is an amenable number.

9998749476 is an abundant number, since it is smaller than the sum of its proper divisors (15275867346).

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

9998749476 is a wasteful number, since it uses less digits than its factorization.

9998749476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277743051 (or 277743046 counting only the distinct ones).

The product of its digits is 246903552, while the sum is 72.

The square root of 9998749476 is about 99993.7471845115. The cubic root of 9998749476 is about 2154.3448805453.

The spelling of 9998749476 in words is "nine billion, nine hundred ninety-eight million, seven hundred forty-nine thousand, four hundred seventy-six".