16262193434881 has 3 divisors (see below), whose sum is σ = 16262197467523. Its totient is φ = 16262189402240.

The previous prime is 16262193434873. The next prime is 16262193434899. The reversal of 16262193434881 is 18843439126261.

The square root of 16262193434881 is 4032641.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 14805634100481 + 1456559334400 = 3847809^2 + 1206880^2 .

It is not a de Polignac number, because 16262193434881 - 2³ = 16262193434873 is a prime.

It is a super-2 number, since 2×16262193434881² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16262193734881) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2016321 + ... + 6048961.

Almost surely, 2^{16262193434881} is an apocalyptic number.

16262193434881 is the 4032641-st square number.

16262193434881 is the 2016321-st centered octagonal number.

It is an amenable number.

16262193434881 is a deficient number, since it is larger than the sum of its proper divisors (4032642).

16262193434881 is an frugal number, since it uses more digits than its factorization.

16262193434881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8065282 (or 4032641 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 58.

The spelling of 16262193434881 in words is "sixteen trillion, two hundred sixty-two billion, one hundred ninety-three million, four hundred thirty-four thousand, eight hundred eighty-one".