104561643631025 has 24 divisors (see below), whose sum is σ = 148188470658240. Its totient is φ = 71694726845760.

The previous prime is 104561643631021. The next prime is 104561643631033. The reversal of 104561643631025 is 520136346165401.

It is not a de Polignac number, because 104561643631025 - 2² = 104561643631021 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (104561643631021) 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, 16838330 + ... + 22195779.

It is an arithmetic number, because the mean of its divisors is an integer number (6174519610760).

Almost surely, 2^{104561643631025} is an apocalyptic number.

It is an amenable number.

104561643631025 is a deficient number, since it is larger than the sum of its proper divisors (43626827027215).

104561643631025 is a wasteful number, since it uses less digits than its factorization.

104561643631025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39049433 (or 39049428 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 47.

Adding to 104561643631025 its reverse (520136346165401), we get a palindrome (624697989796426).

The spelling of 104561643631025 in words is "one hundred four trillion, five hundred sixty-one billion, six hundred forty-three million, six hundred thirty-one thousand, twenty-five".