16380313881 has 16 divisors (see below), whose sum is σ = 22065489600. Its totient is φ = 10807898688.

The previous prime is 16380313867. The next prime is 16380313907. The reversal of 16380313881 is 18831308361.

It is not a de Polignac number, because 16380313881 - 2¹⁹ = 16379789593 is a prime.

It is a super-2 number, since 2×16380313881² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16380313981) 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, 268975 + ... + 324203.

It is an arithmetic number, because the mean of its divisors is an integer number (1379093100).

Almost surely, 2^16380313881 is an apocalyptic number.

It is an amenable number.

16380313881 is a deficient number, since it is larger than the sum of its proper divisors (5685175719).

16380313881 is a wasteful number, since it uses less digits than its factorization.

16380313881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56248.

The product of its (nonzero) digits is 82944, while the sum is 42.

The spelling of 16380313881 in words is "sixteen billion, three hundred eighty million, three hundred thirteen thousand, eight hundred eighty-one".