26420446457 has 4 divisors (see below), whose sum is σ = 26424798720. Its totient is φ = 26416094196.

The previous prime is 26420446427. The next prime is 26420446501. The reversal of 26420446457 is 75464402462.

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-26420446457 is a prime.

It is a super-3 number, since 3×26420446457³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26420446427) 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, 2167013 + ... + 2179170.

It is an arithmetic number, because the mean of its divisors is an integer number (6606199680).

Almost surely, 2^26420446457 is an apocalyptic number.

It is an amenable number.

26420446457 is a deficient number, since it is larger than the sum of its proper divisors (4352263).

26420446457 is an equidigital number, since it uses as much as digits as its factorization.

26420446457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4352262.

The product of its (nonzero) digits is 1290240, while the sum is 44.

The spelling of 26420446457 in words is "twenty-six billion, four hundred twenty million, four hundred forty-six thousand, four hundred fifty-seven".