25513257810 has 32 divisors (see below), whose sum is σ = 61248943872. Its totient is φ = 6801632640.

The previous prime is 25513257799. The next prime is 25513257823. The reversal of 25513257810 is 1875231552.

It is a super-2 number, since 2×25513257810² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8179 + ... + 226038.

It is an arithmetic number, because the mean of its divisors is an integer number (1914029496).

Almost surely, 2^25513257810 is an apocalyptic number.

25513257810 is an abundant number, since it is smaller than the sum of its proper divisors (35735686062).

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

25513257810 is a wasteful number, since it uses less digits than its factorization.

25513257810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237858.

The product of its (nonzero) digits is 84000, while the sum is 39.

The spelling of 25513257810 in words is "twenty-five billion, five hundred thirteen million, two hundred fifty-seven thousand, eight hundred ten".