993281168881 has 16 divisors (see below), whose sum is σ = 1051532856000. Its totient is φ = 936633958848.

The previous prime is 993281168863. The next prime is 993281168897. The reversal of 993281168881 is 188861182399.

It is a cyclic number.

It is not a de Polignac number, because 993281168881 - 2¹³ = 993281160689 is a prime.

It is a super-2 number, since 2×993281168881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (993281168821) 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, 14714595 + ... + 14781943.

It is an arithmetic number, because the mean of its divisors is an integer number (65720803500).

Almost surely, 2^993281168881 is an apocalyptic number.

It is an amenable number.

993281168881 is a deficient number, since it is larger than the sum of its proper divisors (58251687119).

993281168881 is a wasteful number, since it uses less digits than its factorization.

993281168881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79248.

The product of its digits is 11943936, while the sum is 64.

The spelling of 993281168881 in words is "nine hundred ninety-three billion, two hundred eighty-one million, one hundred sixty-eight thousand, eight hundred eighty-one".