25520324525329 has 4 divisors (see below), whose sum is σ = 25652554186276. Its totient is φ = 25388094864384.

The previous prime is 25520324525303. The next prime is 25520324525383. The reversal of 25520324525329 is 92352542302552.

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 1935849257104 + 23584475268225 = 1391348^2 + 4856385^2 .

It is a cyclic number.

It is not a de Polignac number, because 25520324525329 - 2²⁵ = 25520290970897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25520324526329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66114830184 + ... + 66114830569.

It is an arithmetic number, because the mean of its divisors is an integer number (6413138546569).

Almost surely, 2^{25520324525329} is an apocalyptic number.

It is an amenable number.

25520324525329 is a deficient number, since it is larger than the sum of its proper divisors (132229660947).

25520324525329 is a wasteful number, since it uses less digits than its factorization.

25520324525329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132229660946.

The product of its (nonzero) digits is 6480000, while the sum is 49.

The spelling of 25520324525329 in words is "twenty-five trillion, five hundred twenty billion, three hundred twenty-four million, five hundred twenty-five thousand, three hundred twenty-nine".