16038394881 has 16 divisors (see below), whose sum is σ = 22685770944. Its totient is φ = 10044048384.

The previous prime is 16038394837. The next prime is 16038394901. The reversal of 16038394881 is 18849383061.

It is not a de Polignac number, because 16038394881 - 2¹⁹ = 16037870593 is a prime.

It is a super-2 number, since 2×16038394881² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (16038394681) 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, 273976 + ... + 327321.

It is an arithmetic number, because the mean of its divisors is an integer number (1417860684).

Almost surely, 2^16038394881 is an apocalyptic number.

It is an amenable number.

16038394881 is a deficient number, since it is larger than the sum of its proper divisors (6647376063).

16038394881 is a wasteful number, since it uses less digits than its factorization.

16038394881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601840.

The product of its (nonzero) digits is 995328, while the sum is 51.

The spelling of 16038394881 in words is "sixteen billion, thirty-eight million, three hundred ninety-four thousand, eight hundred eighty-one".