26972646623 has 4 divisors (see below), whose sum is σ = 29047465608. Its totient is φ = 24897827640.

The previous prime is 26972646619. The next prime is 26972646647. The reversal of 26972646623 is 32664627962.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32664627962 = 2 ⋅16332313981.

It is a cyclic number.

It is not a de Polignac number, because 26972646623 - 2² = 26972646619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26972646023) 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, 1037409473 + ... + 1037409498.

It is an arithmetic number, because the mean of its divisors is an integer number (7261866402).

Almost surely, 2^26972646623 is an apocalyptic number.

26972646623 is a deficient number, since it is larger than the sum of its proper divisors (2074818985).

26972646623 is a wasteful number, since it uses less digits than its factorization.

26972646623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074818984.

The product of its digits is 7838208, while the sum is 53.

The spelling of 26972646623 in words is "twenty-six billion, nine hundred seventy-two million, six hundred forty-six thousand, six hundred twenty-three".