25511205020416 has 36 divisors (see below), whose sum is σ = 53918213193432. Its totient is φ = 12005272948736.

The previous prime is 25511205020407. The next prime is 25511205020527. The reversal of 25511205020416 is 61402050211552.

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 2930970490 + ... + 2930979193.

It is an arithmetic number, because the mean of its divisors is an integer number (1497728144262).

Almost surely, 2^{25511205020416} is an apocalyptic number.

It is an amenable number.

25511205020416 is an abundant number, since it is smaller than the sum of its proper divisors (28407008173016).

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

25511205020416 is an equidigital number, since it uses as much as digits as its factorization.

25511205020416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5861949716 (or 5861949702 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 34.

Adding to 25511205020416 its reverse (61402050211552), we get a palindrome (86913255231968).

The spelling of 25511205020416 in words is "twenty-five trillion, five hundred eleven billion, two hundred five million, twenty thousand, four hundred sixteen".