26916667969 has 9 divisors (see below), whose sum is σ = 27051045987. Its totient is φ = 26782956624.

The previous prime is 26916667957. The next prime is 26916667997. The reversal of 26916667969 is 96976661962.

The square root of 26916667969 is 164063.

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

It can be written as a sum of positive squares in only one way, i.e., 23279130625 + 3637537344 = 152575^2 + 60312^2 .

It is not a de Polignac number, because 26916667969 - 2⁵ = 26916667937 is a prime.

It is a super-2 number, since 2×26916667969² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26916667369) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 58898389 + ... + 58898845.

Almost surely, 2^26916667969 is an apocalyptic number.

26916667969 is the 164063-rd square number.

26916667969 is the 82032-nd centered octagonal number.

It is an amenable number.

26916667969 is a deficient number, since it is larger than the sum of its proper divisors (134378018).

26916667969 is an frugal number, since it uses more digits than its factorization.

26916667969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632 (or 816 counting only the distinct ones).

The product of its digits is 79361856, while the sum is 67.

The spelling of 26916667969 in words is "twenty-six billion, nine hundred sixteen million, six hundred sixty-seven thousand, nine hundred sixty-nine".