25630641166 has 48 divisors (see below), whose sum is σ = 44313762528. Its totient is φ = 11048788800.

The previous prime is 25630641151. The next prime is 25630641167. The reversal of 25630641166 is 66114603652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25630641167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 647176 + ... + 685636.

It is an arithmetic number, because the mean of its divisors is an integer number (923203386).

Almost surely, 2^25630641166 is an apocalyptic number.

25630641166 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

25630641166 is a deficient number, since it is larger than the sum of its proper divisors (18683121362).

25630641166 is a wasteful number, since it uses less digits than its factorization.

25630641166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38585 (or 38566 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 25630641166 in words is "twenty-five billion, six hundred thirty million, six hundred forty-one thousand, one hundred sixty-six".