25530524851 has 4 divisors (see below), whose sum is σ = 27494411392. Its totient is φ = 23566638312.

The previous prime is 25530524813. The next prime is 25530524867. The reversal of 25530524851 is 15842503552.

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 25530524851 - 2¹⁵ = 25530492083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25530524801) 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, 981943251 + ... + 981943276.

It is an arithmetic number, because the mean of its divisors is an integer number (6873602848).

Almost surely, 2^25530524851 is an apocalyptic number.

25530524851 is a deficient number, since it is larger than the sum of its proper divisors (1963886541).

25530524851 is a wasteful number, since it uses less digits than its factorization.

25530524851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963886540.

The product of its (nonzero) digits is 240000, while the sum is 40.

The spelling of 25530524851 in words is "twenty-five billion, five hundred thirty million, five hundred twenty-four thousand, eight hundred fifty-one".