26618374291 has 4 divisors (see below), whose sum is σ = 28184161032. Its totient is φ = 25052587552.

The previous prime is 26618374231. The next prime is 26618374301. The reversal of 26618374291 is 19247381662.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19247381662 = 2 ⋅9623690831.

It is a cyclic number.

It is not a de Polignac number, because 26618374291 - 2⁷ = 26618374163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26618374231) 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, 782893345 + ... + 782893378.

It is an arithmetic number, because the mean of its divisors is an integer number (7046040258).

Almost surely, 2^26618374291 is an apocalyptic number.

26618374291 is a deficient number, since it is larger than the sum of its proper divisors (1565786741).

26618374291 is a wasteful number, since it uses less digits than its factorization.

26618374291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565786740.

The product of its digits is 870912, while the sum is 49.

The spelling of 26618374291 in words is "twenty-six billion, six hundred eighteen million, three hundred seventy-four thousand, two hundred ninety-one".