25998641038 has 16 divisors (see below), whose sum is σ = 40558956480. Its totient is φ = 12487883616.

The previous prime is 25998640981. The next prime is 25998641057. The reversal of 25998641038 is 83014689952.

It is a self number, because there is not a number n which added to its sum of digits gives 25998641038.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2217781 + ... + 2229472.

It is an arithmetic number, because the mean of its divisors is an integer number (2534934780).

Almost surely, 2^25998641038 is an apocalyptic number.

25998641038 is a deficient number, since it is larger than the sum of its proper divisors (14560315442).

25998641038 is a wasteful number, since it uses less digits than its factorization.

25998641038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4447371.

The product of its (nonzero) digits is 3732480, while the sum is 55.

The spelling of 25998641038 in words is "twenty-five billion, nine hundred ninety-eight million, six hundred forty-one thousand, thirty-eight".