26252478721 has 4 divisors (see below), whose sum is σ = 30002832832. Its totient is φ = 22502124612.

The previous prime is 26252478713. The next prime is 26252478751. The reversal of 26252478721 is 12787425262.

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 not a de Polignac number, because 26252478721 - 2³ = 26252478713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26252478751) 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, 1875177045 + ... + 1875177058.

It is an arithmetic number, because the mean of its divisors is an integer number (7500708208).

Almost surely, 2^26252478721 is an apocalyptic number.

It is an amenable number.

26252478721 is a deficient number, since it is larger than the sum of its proper divisors (3750354111).

26252478721 is an equidigital number, since it uses as much as digits as its factorization.

26252478721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3750354110.

The product of its digits is 752640, while the sum is 46.

The spelling of 26252478721 in words is "twenty-six billion, two hundred fifty-two million, four hundred seventy-eight thousand, seven hundred twenty-one".