26721587138 has 8 divisors (see below), whose sum is σ = 40095458832. Its totient is φ = 13356434196.

The previous prime is 26721587119. The next prime is 26721587143. The reversal of 26721587138 is 83178512762.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2172020 + ... + 2184287.

It is an arithmetic number, because the mean of its divisors is an integer number (5011932354).

Almost surely, 2^26721587138 is an apocalyptic number.

26721587138 is a deficient number, since it is larger than the sum of its proper divisors (13373871694).

26721587138 is a wasteful number, since it uses less digits than its factorization.

26721587138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4359376.

The product of its digits is 1128960, while the sum is 50.

The spelling of 26721587138 in words is "twenty-six billion, seven hundred twenty-one million, five hundred eighty-seven thousand, one hundred thirty-eight".