26946672221 has 16 divisors (see below), whose sum is σ = 31873597440. Its totient is φ = 22293033840.

The previous prime is 26946672211. The next prime is 26946672223. The reversal of 26946672221 is 12227664962.

It is not a de Polignac number, because 26946672221 - 2¹⁰ = 26946671197 is a prime.

It is a super-2 number, since 2×26946672221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26946672223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81581 + ... + 246066.

It is an arithmetic number, because the mean of its divisors is an integer number (1992099840).

Almost surely, 2^26946672221 is an apocalyptic number.

It is an amenable number.

26946672221 is a deficient number, since it is larger than the sum of its proper divisors (4926925219).

26946672221 is a wasteful number, since it uses less digits than its factorization.

26946672221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328064.

The product of its digits is 870912, while the sum is 47.

The spelling of 26946672221 in words is "twenty-six billion, nine hundred forty-six million, six hundred seventy-two thousand, two hundred twenty-one".