25457673529 has 4 divisors (see below), whose sum is σ = 25459413876. Its totient is φ = 25455933184.

The previous prime is 25457673523. The next prime is 25457673541. The reversal of 25457673529 is 92537675452.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16524588304 + 8933085225 = 128548^2 + 94515^2 .

It is a cyclic number.

It is not a de Polignac number, because 25457673529 - 2⁵ = 25457673497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25457673529.

It is not an unprimeable number, because it can be changed into a prime (25457673523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 848044 + ... + 877549.

It is an arithmetic number, because the mean of its divisors is an integer number (6364853469).

Almost surely, 2^25457673529 is an apocalyptic number.

It is an amenable number.

25457673529 is a deficient number, since it is larger than the sum of its proper divisors (1740347).

25457673529 is a wasteful number, since it uses less digits than its factorization.

25457673529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740346.

The product of its digits is 15876000, while the sum is 55.

The spelling of 25457673529 in words is "twenty-five billion, four hundred fifty-seven million, six hundred seventy-three thousand, five hundred twenty-nine".