26102261617 has 4 divisors (see below), whose sum is σ = 27476064880. Its totient is φ = 24728458356.

The previous prime is 26102261543. The next prime is 26102261621. The reversal of 26102261617 is 71616220162.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26102261617 is a prime.

It is a super-2 number, since 2×26102261617² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26102261687) 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, 686901603 + ... + 686901640.

It is an arithmetic number, because the mean of its divisors is an integer number (6869016220).

Almost surely, 2^26102261617 is an apocalyptic number.

It is an amenable number.

26102261617 is a deficient number, since it is larger than the sum of its proper divisors (1373803263).

26102261617 is a wasteful number, since it uses less digits than its factorization.

26102261617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373803262.

The product of its (nonzero) digits is 12096, while the sum is 34.

Adding to 26102261617 its reverse (71616220162), we get a palindrome (97718481779).

The spelling of 26102261617 in words is "twenty-six billion, one hundred two million, two hundred sixty-one thousand, six hundred seventeen".