26309545140 has 24 divisors (see below), whose sum is σ = 73666726560. Its totient is φ = 7015878688.

The previous prime is 26309545139. The next prime is 26309545177. The reversal of 26309545140 is 4154590362.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219246150 + ... + 219246269.

It is an arithmetic number, because the mean of its divisors is an integer number (3069446940).

Almost surely, 2^26309545140 is an apocalyptic number.

26309545140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26309545140 is an abundant number, since it is smaller than the sum of its proper divisors (47357181420).

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

26309545140 is a wasteful number, since it uses less digits than its factorization.

26309545140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438492431 (or 438492429 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 26309545140 in words is "twenty-six billion, three hundred nine million, five hundred forty-five thousand, one hundred forty".