26398911406 has 24 divisors (see below), whose sum is σ = 46138169376. Its totient is φ = 11295456480.

The previous prime is 26398911389. The next prime is 26398911419. The reversal of 26398911406 is 60411989362.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 26398911406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157830 + ... + 278761.

It is an arithmetic number, because the mean of its divisors is an integer number (1922423724).

Almost surely, 2^26398911406 is an apocalyptic number.

26398911406 is a deficient number, since it is larger than the sum of its proper divisors (19739257970).

26398911406 is a wasteful number, since it uses less digits than its factorization.

26398911406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437224 (or 437217 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 49.

The spelling of 26398911406 in words is "twenty-six billion, three hundred ninety-eight million, nine hundred eleven thousand, four hundred six".