25315400216 has 16 divisors (see below), whose sum is σ = 48067216800. Its totient is φ = 12497475744.

The previous prime is 25315400197. The next prime is 25315400251. The reversal of 25315400216 is 61200451352.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20027375 + ... + 20028638.

It is an arithmetic number, because the mean of its divisors is an integer number (3004201050).

Almost surely, 2^25315400216 is an apocalyptic number.

It is an amenable number.

25315400216 is a deficient number, since it is larger than the sum of its proper divisors (22751816584).

25315400216 is a wasteful number, since it uses less digits than its factorization.

25315400216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40056098 (or 40056094 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 25315400216 its reverse (61200451352), we get a palindrome (86515851568).

The spelling of 25315400216 in words is "twenty-five billion, three hundred fifteen million, four hundred thousand, two hundred sixteen".