138633417961 has 4 divisors (see below), whose sum is σ = 138726524500. Its totient is φ = 138540311424.

The previous prime is 138633417959. The next prime is 138633417973. The reversal of 138633417961 is 169714336831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63576596736 + 75056821225 = 252144^2 + 273965^2 .

It is a cyclic number.

It is not a de Polignac number, because 138633417961 - 2¹ = 138633417959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138633417899 and 138633417908.

It is not an unprimeable number, because it can be changed into a prime (138633417761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46551036 + ... + 46554013.

It is an arithmetic number, because the mean of its divisors is an integer number (34681631125).

Almost surely, 2^138633417961 is an apocalyptic number.

It is an amenable number.

138633417961 is a deficient number, since it is larger than the sum of its proper divisors (93106539).

138633417961 is an equidigital number, since it uses as much as digits as its factorization.

138633417961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93106538.

The product of its digits is 1959552, while the sum is 52.

The spelling of 138633417961 in words is "one hundred thirty-eight billion, six hundred thirty-three million, four hundred seventeen thousand, nine hundred sixty-one".