25435321530 has 16 divisors (see below), whose sum is σ = 61044771744. Its totient is φ = 6782752400.

The previous prime is 25435321523. The next prime is 25435321543. The reversal of 25435321530 is 3512353452.

It is a junction number, because it is equal to n+sod(n) for n = 25435321491 and 25435321500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423921996 + ... + 423922055.

It is an arithmetic number, because the mean of its divisors is an integer number (3815298234).

Almost surely, 2^25435321530 is an apocalyptic number.

25435321530 is an abundant number, since it is smaller than the sum of its proper divisors (35609450214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25435321530 is a wasteful number, since it uses less digits than its factorization.

25435321530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847844061.

The product of its (nonzero) digits is 54000, while the sum is 33.

Adding to 25435321530 its reverse (3512353452), we get a palindrome (28947674982).

The spelling of 25435321530 in words is "twenty-five billion, four hundred thirty-five million, three hundred twenty-one thousand, five hundred thirty".