26491821674 has 4 divisors (see below), whose sum is σ = 39737732514. Its totient is φ = 13245910836.

The previous prime is 26491821673. The next prime is 26491821703. The reversal of 26491821674 is 47612819462.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15250521049 + 11241300625 = 123493^2 + 106025^2 .

It is not an unprimeable number, because it can be changed into a prime (26491821673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6622955417 + ... + 6622955420.

Almost surely, 2^26491821674 is an apocalyptic number.

26491821674 is a deficient number, since it is larger than the sum of its proper divisors (13245910840).

26491821674 is a wasteful number, since it uses less digits than its factorization.

26491821674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13245910839.

The product of its digits is 1161216, while the sum is 50.

The spelling of 26491821674 in words is "twenty-six billion, four hundred ninety-one million, eight hundred twenty-one thousand, six hundred seventy-four".