25000055805 has 32 divisors (see below), whose sum is σ = 40420435968. Its totient is φ = 13193408000.

The previous prime is 25000055777. The next prime is 25000055813. The reversal of 25000055805 is 50855000052.

It is not a de Polignac number, because 25000055805 - 2⁷ = 25000055677 is a prime.

It is a super-2 number, since 2×25000055805² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3194257 + ... + 3202073.

It is an arithmetic number, because the mean of its divisors is an integer number (1263138624).

Almost surely, 2^25000055805 is an apocalyptic number.

It is an amenable number.

25000055805 is a deficient number, since it is larger than the sum of its proper divisors (15420380163).

25000055805 is a wasteful number, since it uses less digits than its factorization.

25000055805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10037.

The product of its (nonzero) digits is 10000, while the sum is 30.

Adding to 25000055805 its reverse (50855000052), we get a palindrome (75855055857).

The spelling of 25000055805 in words is "twenty-five billion, fifty-five thousand, eight hundred five".