9946038881 has 4 divisors (see below), whose sum is σ = 9946948500. Its totient is φ = 9945129264.

The previous prime is 9946038841. The next prime is 9946038899. The reversal of 9946038881 is 1888306499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1888306499 = 1109 ⋅1702711.

It can be written as a sum of positive squares in 2 ways, for example, as 3533232481 + 6412806400 = 59441^2 + 80080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9946038881 is a prime.

It is a super-2 number, since 2×9946038881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9946038841) 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, 438206 + ... + 460343.

It is an arithmetic number, because the mean of its divisors is an integer number (2486737125).

Almost surely, 2^9946038881 is an apocalyptic number.

It is an amenable number.

9946038881 is a deficient number, since it is larger than the sum of its proper divisors (909619).

9946038881 is a wasteful number, since it uses less digits than its factorization.

9946038881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909618.

The product of its (nonzero) digits is 2985984, while the sum is 56.

The square root of 9946038881 is about 99729.8294443543. The cubic root of 9946038881 is about 2150.5525085176.

The spelling of 9946038881 in words is "nine billion, nine hundred forty-six million, thirty-eight thousand, eight hundred eighty-one".