25279016529 has 16 divisors (see below), whose sum is σ = 36757548800. Its totient is φ = 15359400576.

The previous prime is 25279016519. The next prime is 25279016549. The reversal of 25279016529 is 92561097252.

It is a happy number.

It is not a de Polignac number, because 25279016529 - 2¹² = 25279012433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25279016509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4099324 + ... + 4105485.

It is an arithmetic number, because the mean of its divisors is an integer number (2297346800).

Almost surely, 2^25279016529 is an apocalyptic number.

It is an amenable number.

25279016529 is a deficient number, since it is larger than the sum of its proper divisors (11478532271).

25279016529 is a wasteful number, since it uses less digits than its factorization.

25279016529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8204904.

The product of its (nonzero) digits is 680400, while the sum is 48.

The spelling of 25279016529 in words is "twenty-five billion, two hundred seventy-nine million, sixteen thousand, five hundred twenty-nine".