25447554983 has 4 divisors (see below), whose sum is σ = 26944470000. Its totient is φ = 23950639968.

The previous prime is 25447554973. The next prime is 25447554989. The reversal of 25447554983 is 38945574452.

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 25447554983 - 2⁴ = 25447554967 is a prime.

It is a super-2 number, since 2×25447554983² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25447554989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 748457483 + ... + 748457516.

It is an arithmetic number, because the mean of its divisors is an integer number (6736117500).

Almost surely, 2^25447554983 is an apocalyptic number.

25447554983 is a deficient number, since it is larger than the sum of its proper divisors (1496915017).

25447554983 is a wasteful number, since it uses less digits than its factorization.

25447554983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496915016.

The product of its digits is 24192000, while the sum is 56.

The spelling of 25447554983 in words is "twenty-five billion, four hundred forty-seven million, five hundred fifty-four thousand, nine hundred eighty-three".