9967951388 has 48 divisors (see below), whose sum is σ = 17829036960. Its totient is φ = 4875552000.

The previous prime is 9967951387. The next prime is 9967951421. The reversal of 9967951388 is 8831597699.

It is a super-2 number, since 2×9967951388² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9967951387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15079778 + ... + 15080438.

It is an arithmetic number, because the mean of its divisors is an integer number (371438270).

Almost surely, 2^9967951388 is an apocalyptic number.

It is an amenable number.

9967951388 is a deficient number, since it is larger than the sum of its proper divisors (7861085572).

9967951388 is a wasteful number, since it uses less digits than its factorization.

9967951388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158 (or 1156 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 65.

The square root of 9967951388 is about 99839.6283446608. The cubic root of 9967951388 is about 2152.1306722083.

The spelling of 9967951388 in words is "nine billion, nine hundred sixty-seven million, nine hundred fifty-one thousand, three hundred eighty-eight".