26405342380 has 12 divisors (see below), whose sum is σ = 55451219040. Its totient is φ = 10562136944.

The previous prime is 26405342357. The next prime is 26405342389. The reversal of 26405342380 is 8324350462.

It is not an unprimeable number, because it can be changed into a prime (26405342389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660133540 + ... + 660133579.

It is an arithmetic number, because the mean of its divisors is an integer number (4620934920).

Almost surely, 2^26405342380 is an apocalyptic number.

26405342380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26405342380 is an abundant number, since it is smaller than the sum of its proper divisors (29045876660).

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

26405342380 is a wasteful number, since it uses less digits than its factorization.

26405342380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320267128 (or 1320267126 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 26405342380 in words is "twenty-six billion, four hundred five million, three hundred forty-two thousand, three hundred eighty".