993235160881 has 8 divisors (see below), whose sum is σ = 1009549016424. Its totient is φ = 976922315520.

The previous prime is 993235160851. The next prime is 993235160893. The reversal of 993235160881 is 188061532399.

It can be written as a sum of positive squares in 4 ways, for example, as 3100707856 + 990134453025 = 55684^2 + 995055^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 993235160881 - 2⁹ = 993235160369 is a prime.

It is a super-2 number, since 2×993235160881² (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 (993235160851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1876185 + ... + 2346601.

It is an arithmetic number, because the mean of its divisors is an integer number (126193627053).

Almost surely, 2^993235160881 is an apocalyptic number.

It is an amenable number.

993235160881 is a deficient number, since it is larger than the sum of its proper divisors (16313855543).

993235160881 is a wasteful number, since it uses less digits than its factorization.

993235160881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505091.

The product of its (nonzero) digits is 2799360, while the sum is 55.

The spelling of 993235160881 in words is "nine hundred ninety-three billion, two hundred thirty-five million, one hundred sixty thousand, eight hundred eighty-one".