25501211042 has 16 divisors (see below), whose sum is σ = 38620938240. Its totient is φ = 12627744192.

The previous prime is 25501211039. The next prime is 25501211069. The reversal of 25501211042 is 24011210552.

It is a junction number, because it is equal to n+sod(n) for n = 25501210999 and 25501211017.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244943 + ... + 333165.

It is an arithmetic number, because the mean of its divisors is an integer number (2413808640).

Almost surely, 2^25501211042 is an apocalyptic number.

25501211042 is a deficient number, since it is larger than the sum of its proper divisors (13119727198).

25501211042 is a wasteful number, since it uses less digits than its factorization.

25501211042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89617.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 25501211042 its reverse (24011210552), we get a palindrome (49512421594).

The spelling of 25501211042 in words is "twenty-five billion, five hundred one million, two hundred eleven thousand, forty-two".