25573649829 has 48 divisors (see below), whose sum is σ = 43231349952. Its totient is φ = 13326792192.

The previous prime is 25573649819. The next prime is 25573649861. The reversal of 25573649829 is 92894637552.

It is not a de Polignac number, because 25573649829 - 2¹² = 25573645733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25573649809) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77997 + ... + 239229.

It is an arithmetic number, because the mean of its divisors is an integer number (900653124).

Almost surely, 2^25573649829 is an apocalyptic number.

It is an amenable number.

25573649829 is a deficient number, since it is larger than the sum of its proper divisors (17657700123).

25573649829 is a wasteful number, since it uses less digits than its factorization.

25573649829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161346 (or 161339 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 60.

The spelling of 25573649829 in words is "twenty-five billion, five hundred seventy-three million, six hundred forty-nine thousand, eight hundred twenty-nine".