25550478975 has 48 divisors (see below), whose sum is σ = 48330478080. Its totient is φ = 11667580800.

The previous prime is 25550478911. The next prime is 25550478979. The reversal of 25550478975 is 57987405552.

It is not a de Polignac number, because 25550478975 - 2⁶ = 25550478911 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25550478979) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 468166 + ... + 519884.

It is an arithmetic number, because the mean of its divisors is an integer number (1006884960).

Almost surely, 2^25550478975 is an apocalyptic number.

25550478975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25550478975 is a deficient number, since it is larger than the sum of its proper divisors (22779999105).

25550478975 is a wasteful number, since it uses less digits than its factorization.

25550478975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52680 (or 52675 counting only the distinct ones).

The product of its (nonzero) digits is 17640000, while the sum is 57.

The spelling of 25550478975 in words is "twenty-five billion, five hundred fifty million, four hundred seventy-eight thousand, nine hundred seventy-five".