25978426898 has 32 divisors (see below), whose sum is σ = 39776788800. Its totient is φ = 12722863104.

The previous prime is 25978426849. The next prime is 25978426931. The reversal of 25978426898 is 89862487952.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10071773 + ... + 10074351.

It is an arithmetic number, because the mean of its divisors is an integer number (1243024650).

Almost surely, 2^25978426898 is an apocalyptic number.

25978426898 is a deficient number, since it is larger than the sum of its proper divisors (13798361902).

25978426898 is a wasteful number, since it uses less digits than its factorization.

25978426898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3194.

The product of its digits is 139345920, while the sum is 68.

It can be divided in two parts, 259784 and 26898, that added together give a palindrome (286682).

The spelling of 25978426898 in words is "twenty-five billion, nine hundred seventy-eight million, four hundred twenty-six thousand, eight hundred ninety-eight".