26521869493 has 8 divisors (see below), whose sum is σ = 30694388480. Its totient is φ = 22445270640.

The previous prime is 26521869481. The next prime is 26521869499. The reversal of 26521869493 is 39496812562.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26521869493 - 2⁹ = 26521868981 is a prime.

It is a super-2 number, since 2×26521869493² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26521869499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23979438 + ... + 23980543.

It is an arithmetic number, because the mean of its divisors is an integer number (3836798560).

Almost surely, 2^26521869493 is an apocalyptic number.

It is an amenable number.

26521869493 is a deficient number, since it is larger than the sum of its proper divisors (4172518987).

26521869493 is an equidigital number, since it uses as much as digits as its factorization.

26521869493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47960067.

The product of its digits is 5598720, while the sum is 55.

The spelling of 26521869493 in words is "twenty-six billion, five hundred twenty-one million, eight hundred sixty-nine thousand, four hundred ninety-three".