25161660111 has 16 divisors (see below), whose sum is σ = 38536210944. Its totient is φ = 14305103904.

The previous prime is 25161660061. The next prime is 25161660127. The reversal of 25161660111 is 11106616152.

It is not a de Polignac number, because 25161660111 - 2¹⁸ = 25161397967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25161660131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3036915 + ... + 3045188.

It is an arithmetic number, because the mean of its divisors is an integer number (2408513184).

Almost surely, 2^25161660111 is an apocalyptic number.

25161660111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25161660111 is a deficient number, since it is larger than the sum of its proper divisors (13374550833).

25161660111 is a wasteful number, since it uses less digits than its factorization.

25161660111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6082310.

The product of its (nonzero) digits is 2160, while the sum is 30.

The spelling of 25161660111 in words is "twenty-five billion, one hundred sixty-one million, six hundred sixty thousand, one hundred eleven".