16886297261 has 4 divisors (see below), whose sum is σ = 16888051932. Its totient is φ = 16884542592.

The previous prime is 16886297257. The next prime is 16886297279. The reversal of 16886297261 is 16279268861.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10973610025 + 5912687236 = 104755^2 + 76894^2 .

It is a cyclic number.

It is not a de Polignac number, because 16886297261 - 2² = 16886297257 is a prime.

It is a super-2 number, since 2×16886297261² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16886297197 and 16886297206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16886297201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 862820 + ... + 882173.

It is an arithmetic number, because the mean of its divisors is an integer number (4222012983).

Almost surely, 2^16886297261 is an apocalyptic number.

It is an amenable number.

16886297261 is a deficient number, since it is larger than the sum of its proper divisors (1754671).

16886297261 is an equidigital number, since it uses as much as digits as its factorization.

16886297261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754670.

The product of its digits is 3483648, while the sum is 56.

The spelling of 16886297261 in words is "sixteen billion, eight hundred eighty-six million, two hundred ninety-seven thousand, two hundred sixty-one".