25849629998442 has 128 divisors (see below), whose sum is σ = 60200647372800. Its totient is φ = 8206266100032.

The previous prime is 25849629998371. The next prime is 25849629998443. The reversal of 25849629998442 is 24489992694852.

25849629998442 is a `hidden beast` number, since 2 + 5 + 8 + 496 + 2 + 9 + 9 + 9 + 84 + 42 = 666.

It is not an unprimeable number, because it can be changed into a prime (25849629998443) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 654252184 + ... + 654291692.

It is an arithmetic number, because the mean of its divisors is an integer number (470317557600).

Almost surely, 2^{25849629998442} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25849629998442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30100323686400).

25849629998442 is an abundant number, since it is smaller than the sum of its proper divisors (34351017374358).

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

25849629998442 is a wasteful number, since it uses less digits than its factorization.

25849629998442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41809 (or 41803 counting only the distinct ones).

The product of its digits is 6449725440, while the sum is 81.

The spelling of 25849629998442 in words is "twenty-five trillion, eight hundred forty-nine billion, six hundred twenty-nine million, nine hundred ninety-eight thousand, four hundred forty-two".