26431262653 has 4 divisors (see below), whose sum is σ = 27822381760.
Its totient is φ = 25040143548.
The previous prime is 26431262651. The next prime is 26431262707. The reversal of 26431262653 is 35626213462.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is not a de Polignac number, because 26431262653 - 21 = 26431262651 is a prime.
It is a super-2 number, since 2×264312626532 (a number of 22 digits) contains 22 as substring.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (26431262651) 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, 695559525 + ... + 695559562.
It is an arithmetic number, because the mean of its divisors is an integer number (6955595440).
Almost surely, 226431262653 is an apocalyptic number.
It is an amenable number.
26431262653 is a deficient number, since it is larger than the sum of its proper divisors (1391119107).
26431262653 is a wasteful number, since it uses less digits than its factorization.
26431262653 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1391119106.
The product of its digits is 311040, while the sum is 40.
The spelling of 26431262653 in words is "twenty-six billion, four hundred thirty-one million, two hundred sixty-two thousand, six hundred fifty-three".