9947557499 has 12 divisors (see below), whose sum is σ = 10948751520. Its totient is φ = 9031110000.

The previous prime is 9947557441. The next prime is 9947557511.

9947557499 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9947557499 - 2¹⁶ = 9947491963 is a prime.

It is a super-2 number, since 2×9947557499² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9947554499) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36137 + ... + 145605.

It is an arithmetic number, because the mean of its divisors is an integer number (912395960).

Almost surely, 2^9947557499 is an apocalyptic number.

9947557499 is a deficient number, since it is larger than the sum of its proper divisors (1001194021).

9947557499 is a wasteful number, since it uses less digits than its factorization.

9947557499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110242 (or 110231 counting only the distinct ones).

The product of its digits is 128595600, while the sum is 68.

The square root of 9947557499 is about 99737.4428136194. The cubic root of 9947557499 is about 2150.6619558257.

The spelling of 9947557499 in words is "nine billion, nine hundred forty-seven million, five hundred fifty-seven thousand, four hundred ninety-nine".