9930554881 has 4 divisors (see below), whose sum is σ = 10694443732. Its totient is φ = 9166666032.

The previous prime is 9930554873. The next prime is 9930554903. The reversal of 9930554881 is 1884550399.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1884550399 = 47 ⋅40096817.

It can be written as a sum of positive squares in 2 ways, for example, as 2651735025 + 7278819856 = 51495^2 + 85316^2 .

It is a cyclic number.

It is not a de Polignac number, because 9930554881 - 2³ = 9930554873 is a prime.

It is a super-2 number, since 2×9930554881² (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 (9930554861) 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, 381944406 + ... + 381944431.

It is an arithmetic number, because the mean of its divisors is an integer number (2673610933).

Almost surely, 2^9930554881 is an apocalyptic number.

It is an amenable number.

9930554881 is a deficient number, since it is larger than the sum of its proper divisors (763888851).

9930554881 is a wasteful number, since it uses less digits than its factorization.

9930554881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763888850.

The product of its (nonzero) digits is 1555200, while the sum is 52.

The square root of 9930554881 is about 99652.1694746281. The cubic root of 9930554881 is about 2149.4359350270.

The spelling of 9930554881 in words is "nine billion, nine hundred thirty million, five hundred fifty-four thousand, eight hundred eighty-one".