26981696445 has 32 divisors (see below), whose sum is σ = 47104104960. Its totient is φ = 13079595840.

The previous prime is 26981696411. The next prime is 26981696447. The reversal of 26981696445 is 54469618962.

It is not a de Polignac number, because 26981696445 - 2⁷ = 26981696317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26981696447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1134486 + ... + 1158024.

It is an arithmetic number, because the mean of its divisors is an integer number (1472003280).

Almost surely, 2^26981696445 is an apocalyptic number.

It is an amenable number.

26981696445 is a deficient number, since it is larger than the sum of its proper divisors (20122408515).

26981696445 is a wasteful number, since it uses less digits than its factorization.

26981696445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30505.

The product of its digits is 22394880, while the sum is 60.

The spelling of 26981696445 in words is "twenty-six billion, nine hundred eighty-one million, six hundred ninety-six thousand, four hundred forty-five".