26454371905 has 24 divisors (see below), whose sum is σ = 34436068920. Its totient is φ = 19500848640.

The previous prime is 26454371899. The next prime is 26454371921. The reversal of 26454371905 is 50917345462.

It is a happy number.

It is a Cunningham number, because it is equal to 162648²+1.

It can be written as a sum of positive squares in 12 ways, for example, as 22094146881 + 4360225024 = 148641^2 + 66032^2 .

It is not a de Polignac number, because 26454371905 - 2¹¹ = 26454369857 is a prime.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 453295 + ... + 508315.

It is an arithmetic number, because the mean of its divisors is an integer number (1434836205).

Almost surely, 2^26454371905 is an apocalyptic number.

It is an amenable number.

26454371905 is a deficient number, since it is larger than the sum of its proper divisors (7981697015).

26454371905 is a wasteful number, since it uses less digits than its factorization.

26454371905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55621 (or 55608 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 26454371905 in words is "twenty-six billion, four hundred fifty-four million, three hundred seventy-one thousand, nine hundred five".