26400342140 has 72 divisors (see below), whose sum is σ = 57390792480. Its totient is φ = 10200954240.

The previous prime is 26400342077. The next prime is 26400342169. The reversal of 26400342140 is 4124300462.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15817226 + ... + 15818894.

It is an arithmetic number, because the mean of its divisors is an integer number (797094340).

Almost surely, 2^26400342140 is an apocalyptic number.

26400342140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26400342140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28695396240).

26400342140 is an abundant number, since it is smaller than the sum of its proper divisors (30990450340).

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

26400342140 is a wasteful number, since it uses less digits than its factorization.

26400342140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2563 (or 2530 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The spelling of 26400342140 in words is "twenty-six billion, four hundred million, three hundred forty-two thousand, one hundred forty".