25538520435 has 16 divisors (see below), whose sum is σ = 40920783360. Its totient is φ = 13600827360.

The previous prime is 25538520431. The next prime is 25538520467. The reversal of 25538520435 is 53402583552.

It is not a de Polignac number, because 25538520435 - 2² = 25538520431 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25538520431) 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, 1221595 + ... + 1242324.

It is an arithmetic number, because the mean of its divisors is an integer number (2557548960).

Almost surely, 2^25538520435 is an apocalyptic number.

25538520435 is a deficient number, since it is larger than the sum of its proper divisors (15382262925).

25538520435 is a wasteful number, since it uses less digits than its factorization.

25538520435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464618.

The product of its (nonzero) digits is 720000, while the sum is 42.

The spelling of 25538520435 in words is "twenty-five billion, five hundred thirty-eight million, five hundred twenty thousand, four hundred thirty-five".