25661235141 has 6 divisors (see below), whose sum is σ = 37066228550. Its totient is φ = 17107490088.

The previous prime is 25661235139. The next prime is 25661235161. The reversal of 25661235141 is 14153216652.

25661235141 is a `hidden beast` number, since 2 + 5 + 6 + 612 + 35 + 1 + 4 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 25263830916 + 397404225 = 158946^2 + 19935^2 .

It is not a de Polignac number, because 25661235141 - 2¹ = 25661235139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25661235096 and 25661235105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25661235161) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1425624166 + ... + 1425624183.

Almost surely, 2^25661235141 is an apocalyptic number.

It is an amenable number.

25661235141 is a deficient number, since it is larger than the sum of its proper divisors (11404993409).

25661235141 is a wasteful number, since it uses less digits than its factorization.

25661235141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2851248355 (or 2851248352 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The spelling of 25661235141 in words is "twenty-five billion, six hundred sixty-one million, two hundred thirty-five thousand, one hundred forty-one".