26342139540 has 96 divisors (see below), whose sum is σ = 78826898304. Its totient is φ = 6549544960.

The previous prime is 26342139539. The next prime is 26342139587. The reversal of 26342139540 is 4593124362.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11541 + ... + 229820.

It is an arithmetic number, because the mean of its divisors is an integer number (821113524).

Almost surely, 2^26342139540 is an apocalyptic number.

26342139540 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 26342139540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39413449152).

26342139540 is an abundant number, since it is smaller than the sum of its proper divisors (52484758764).

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

26342139540 is a wasteful number, since it uses less digits than its factorization.

26342139540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241497 (or 241495 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The spelling of 26342139540 in words is "twenty-six billion, three hundred forty-two million, one hundred thirty-nine thousand, five hundred forty".