26138357554 has 4 divisors (see below), whose sum is σ = 39207536334. Its totient is φ = 13069178776.

The previous prime is 26138357533. The next prime is 26138357563. The reversal of 26138357554 is 45575383162.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15076156225 + 11062201329 = 122785^2 + 105177^2 .

It is a junction number, because it is equal to n+sod(n) for n = 26138357498 and 26138357507.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6534589387 + ... + 6534589390.

Almost surely, 2^26138357554 is an apocalyptic number.

26138357554 is a deficient number, since it is larger than the sum of its proper divisors (13069178780).

26138357554 is a wasteful number, since it uses less digits than its factorization.

26138357554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13069178779.

The product of its digits is 3024000, while the sum is 49.

The spelling of 26138357554 in words is "twenty-six billion, one hundred thirty-eight million, three hundred fifty-seven thousand, five hundred fifty-four".