25984885147 has 4 divisors (see below), whose sum is σ = 27983722480. Its totient is φ = 23986047816.

The previous prime is 25984885133. The next prime is 25984885187. The reversal of 25984885147 is 74158848952.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25984885147 - 2³¹ = 23837401499 is a prime.

It is a super-2 number, since 2×25984885147² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25984885187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 999418647 + ... + 999418672.

It is an arithmetic number, because the mean of its divisors is an integer number (6995930620).

Almost surely, 2^25984885147 is an apocalyptic number.

25984885147 is a deficient number, since it is larger than the sum of its proper divisors (1998837333).

25984885147 is a wasteful number, since it uses less digits than its factorization.

25984885147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998837332.

The product of its digits is 25804800, while the sum is 61.

The spelling of 25984885147 in words is "twenty-five billion, nine hundred eighty-four million, eight hundred eighty-five thousand, one hundred forty-seven".