26967879961 has 9 divisors (see below), whose sum is σ = 29644366143. Its totient is φ = 24514612320.

The previous prime is 26967879959. The next prime is 26967879979. The reversal of 26967879961 is 16997876962.

The square root of 26967879961 is 164219.

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., 23280961561 + 3686918400 = 152581^2 + 60720^2 .

It is not a de Polignac number, because 26967879961 - 2¹ = 26967879959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26967879761) 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, 1798945 + ... + 1813873.

Almost surely, 2^26967879961 is an apocalyptic number.

26967879961 is the 164219-th square number.

26967879961 is the 82110-th centered octagonal number.

It is an amenable number.

26967879961 is a deficient number, since it is larger than the sum of its proper divisors (2676486182).

26967879961 is an frugal number, since it uses more digits than its factorization.

26967879961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29880 (or 14940 counting only the distinct ones).

The product of its digits is 123451776, while the sum is 70.

The spelling of 26967879961 in words is "twenty-six billion, nine hundred sixty-seven million, eight hundred seventy-nine thousand, nine hundred sixty-one".