8661485761438 has 16 divisors (see below), whose sum is σ = 13432061343744. Its totient is φ = 4184563825080.

The previous prime is 8661485761349. The next prime is 8661485761501. The reversal of 8661485761438 is 8341675841668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107920770 + ... + 108000997.

It is an arithmetic number, because the mean of its divisors is an integer number (839503833984).

Almost surely, 2^{8661485761438} is an apocalyptic number.

8661485761438 is a deficient number, since it is larger than the sum of its proper divisors (4770575582306).

8661485761438 is a wasteful number, since it uses less digits than its factorization.

8661485761438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215922447.

The product of its digits is 185794560, while the sum is 67.

The spelling of 8661485761438 in words is "eight trillion, six hundred sixty-one billion, four hundred eighty-five million, seven hundred sixty-one thousand, four hundred thirty-eight".