26138949004 has 12 divisors (see below), whose sum is σ = 52277898064. Its totient is φ = 11202406704.

The previous prime is 26138948977. The next prime is 26138949007. The reversal of 26138949004 is 40094983162.

26138949004 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (26138949007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466766919 + ... + 466766974.

Almost surely, 2^26138949004 is an apocalyptic number.

It is an amenable number.

26138949004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26138949004 is a wasteful number, since it uses less digits than its factorization.

26138949004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933533904 (or 933533902 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 26138949004 in words is "twenty-six billion, one hundred thirty-eight million, nine hundred forty-nine thousand, four".