26138439620 has 24 divisors (see below), whose sum is σ = 54893801088. Its totient is φ = 10454789600.

The previous prime is 26138439619. The next prime is 26138439629. The reversal of 26138439620 is 2693483162.

It is not an unprimeable number, because it can be changed into a prime (26138439629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 592115 + ... + 634725.

It is an arithmetic number, because the mean of its divisors is an integer number (2287241712).

Almost surely, 2^26138439620 is an apocalyptic number.

26138439620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26138439620 is an abundant number, since it is smaller than the sum of its proper divisors (28755361468).

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

26138439620 is a wasteful number, since it uses less digits than its factorization.

26138439620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73291 (or 73289 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 44.

The spelling of 26138439620 in words is "twenty-six billion, one hundred thirty-eight million, four hundred thirty-nine thousand, six hundred twenty".