26809457902 has 4 divisors (see below), whose sum is σ = 40214186856. Its totient is φ = 13404728950.

The previous prime is 26809457893. The next prime is 26809457923. The reversal of 26809457902 is 20975490862.

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

It is a super-2 number, since 2×26809457902² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26809457902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6702364474 + ... + 6702364477.

It is an arithmetic number, because the mean of its divisors is an integer number (10053546714).

Almost surely, 2^26809457902 is an apocalyptic number.

26809457902 is a deficient number, since it is larger than the sum of its proper divisors (13404728954).

26809457902 is a wasteful number, since it uses less digits than its factorization.

26809457902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13404728953.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 26809457902 in words is "twenty-six billion, eight hundred nine million, four hundred fifty-seven thousand, nine hundred two".