26463121505 has 8 divisors (see below), whose sum is σ = 31799073192. Its totient is φ = 21141612288.

The previous prime is 26463121493. The next prime is 26463121507. The reversal of 26463121505 is 50512136462.

It can be written as a sum of positive squares in 4 ways, for example, as 18378953761 + 8084167744 = 135569^2 + 89912^2 .

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 26463121505 - 2¹⁸ = 26462859361 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (26463121507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3606584 + ... + 3613913.

It is an arithmetic number, because the mean of its divisors is an integer number (3974884149).

Almost surely, 2^26463121505 is an apocalyptic number.

It is an amenable number.

26463121505 is a deficient number, since it is larger than the sum of its proper divisors (5335951687).

26463121505 is an equidigital number, since it uses as much as digits as its factorization.

26463121505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7221235.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 26463121505 its reverse (50512136462), we get a palindrome (76975257967).

The spelling of 26463121505 in words is "twenty-six billion, four hundred sixty-three million, one hundred twenty-one thousand, five hundred five".