25505063145 has 24 divisors (see below), whose sum is σ = 44614369800. Its totient is φ = 13477902336.

The previous prime is 25505063141. The next prime is 25505063167. The reversal of 25505063145 is 54136050552.

25505063145 is a `hidden beast` number, since 2 + 5 + 5 + 0 + 506 + 3 + 145 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2080454544 + 23424608601 = 45612^2 + 153051^2 .

It is not a de Polignac number, because 25505063145 - 2² = 25505063141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25505063141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2595000 + ... + 2604809.

It is an arithmetic number, because the mean of its divisors is an integer number (1858932075).

Almost surely, 2^25505063145 is an apocalyptic number.

It is an amenable number.

25505063145 is a deficient number, since it is larger than the sum of its proper divisors (19109306655).

25505063145 is a wasteful number, since it uses less digits than its factorization.

25505063145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5199929 (or 5199926 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The spelling of 25505063145 in words is "twenty-five billion, five hundred five million, sixty-three thousand, one hundred forty-five".