25338907898 has 12 divisors (see below), whose sum is σ = 40375665582. Its totient is φ = 11924191680.

The previous prime is 25338907897. The next prime is 25338907933. The reversal of 25338907898 is 89870983352.

It can be written as a sum of positive squares in 3 ways, for example, as 24604118449 + 734789449 = 156857^2 + 27107^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25338907898.

It is not an unprimeable number, because it can be changed into a prime (25338907897) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21918893 + ... + 21920048.

Almost surely, 2^25338907898 is an apocalyptic number.

25338907898 is a deficient number, since it is larger than the sum of its proper divisors (15036757684).

25338907898 is a wasteful number, since it uses less digits than its factorization.

25338907898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43838977 (or 43838960 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 62.

The spelling of 25338907898 in words is "twenty-five billion, three hundred thirty-eight million, nine hundred seven thousand, eight hundred ninety-eight".