9952521988 has 12 divisors (see below), whose sum is σ = 17417872332. Its totient is φ = 4975987040.

The previous prime is 9952521983. The next prime is 9952521991. The reversal of 9952521988 is 8891252599.

It can be written as a sum of positive squares in 2 ways, for example, as 2487216384 + 7465305604 = 49872^2 + 86402^2 .

It is not an unprimeable number, because it can be changed into a prime (9952521983) 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, 28518 + ... + 143938.

It is an arithmetic number, because the mean of its divisors is an integer number (1451489361).

Almost surely, 2^9952521988 is an apocalyptic number.

It is an amenable number.

9952521988 is a deficient number, since it is larger than the sum of its proper divisors (7465350344).

9952521988 is a wasteful number, since it uses less digits than its factorization.

9952521988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136982 (or 136980 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 58.

The square root of 9952521988 is about 99762.3274989111. The cubic root of 9952521988 is about 2151.0196705026.

The spelling of 9952521988 in words is "nine billion, nine hundred fifty-two million, five hundred twenty-one thousand, nine hundred eighty-eight".