26250138890 has 16 divisors (see below), whose sum is σ = 48402695880. Its totient is φ = 10243956480.

The previous prime is 26250138877. The next prime is 26250138899. The reversal of 26250138890 is 9883105262.

It can be written as a sum of positive squares in 4 ways, for example, as 6811365961 + 19438772929 = 82531^2 + 139423^2 .

It is not an unprimeable number, because it can be changed into a prime (26250138899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32011955 + ... + 32012774.

Almost surely, 2^26250138890 is an apocalyptic number.

26250138890 is a deficient number, since it is larger than the sum of its proper divisors (22152556990).

26250138890 is a wasteful number, since it uses less digits than its factorization.

26250138890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64024777.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 26250138890 in words is "twenty-six billion, two hundred fifty million, one hundred thirty-eight thousand, eight hundred ninety".