26349772640 has 24 divisors (see below), whose sum is σ = 62251338240. Its totient is φ = 10539908992.

The previous prime is 26349772609. The next prime is 26349772681. The reversal of 26349772640 is 4627794362.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82342880 + ... + 82343199.

It is an arithmetic number, because the mean of its divisors is an integer number (2593805760).

Almost surely, 2^26349772640 is an apocalyptic number.

26349772640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26349772640 is an abundant number, since it is smaller than the sum of its proper divisors (35901565600).

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

26349772640 is a wasteful number, since it uses less digits than its factorization.

26349772640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164686094 (or 164686086 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 50.

The spelling of 26349772640 in words is "twenty-six billion, three hundred forty-nine million, seven hundred seventy-two thousand, six hundred forty".