26628365481 has 4 divisors (see below), whose sum is σ = 35504487312. Its totient is φ = 17752243652.

The previous prime is 26628365473. The next prime is 26628365513. The reversal of 26628365481 is 18456382662.

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 26628365481 - 2³ = 26628365473 is a prime.

It is a super-2 number, since 2×26628365481² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26628365431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4438060911 + ... + 4438060916.

It is an arithmetic number, because the mean of its divisors is an integer number (8876121828).

Almost surely, 2^26628365481 is an apocalyptic number.

It is an amenable number.

26628365481 is a deficient number, since it is larger than the sum of its proper divisors (8876121831).

26628365481 is an equidigital number, since it uses as much as digits as its factorization.

26628365481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8876121830.

The product of its digits is 3317760, while the sum is 51.

The spelling of 26628365481 in words is "twenty-six billion, six hundred twenty-eight million, three hundred sixty-five thousand, four hundred eighty-one".