26420673657 has 16 divisors (see below), whose sum is σ = 41348185472. Its totient is φ = 14689486080.

The previous prime is 26420673647. The next prime is 26420673673. The reversal of 26420673657 is 75637602462.

It is not a de Polignac number, because 26420673657 - 2⁸ = 26420673401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26420673637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17000944 + ... + 17002497.

It is an arithmetic number, because the mean of its divisors is an integer number (2584261592).

Almost surely, 2^26420673657 is an apocalyptic number.

It is an amenable number.

26420673657 is a deficient number, since it is larger than the sum of its proper divisors (14927511815).

26420673657 is a wasteful number, since it uses less digits than its factorization.

26420673657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34003488.

The product of its (nonzero) digits is 2540160, while the sum is 48.

The spelling of 26420673657 in words is "twenty-six billion, four hundred twenty million, six hundred seventy-three thousand, six hundred fifty-seven".