123617162745 has 16 divisors (see below), whose sum is σ = 219763845120. Its totient is φ = 65929153392.

The previous prime is 123617162731. The next prime is 123617162749. The reversal of 123617162745 is 547261716321.

123617162745 is a `hidden beast` number, since 1 + 2 + 3 + 6 + 17 + 1 + 627 + 4 + 5 = 666.

It is not a de Polignac number, because 123617162745 - 2¹⁴ = 123617146361 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 123617162745.

It is not an unprimeable number, because it can be changed into a prime (123617162749) 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, 457841209 + ... + 457841478.

It is an arithmetic number, because the mean of its divisors is an integer number (13735240320).

Almost surely, 2^123617162745 is an apocalyptic number.

123617162745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123617162745 is a deficient number, since it is larger than the sum of its proper divisors (96146682375).

123617162745 is an equidigital number, since it uses as much as digits as its factorization.

123617162745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915682701 (or 915682695 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The spelling of 123617162745 in words is "one hundred twenty-three billion, six hundred seventeen million, one hundred sixty-two thousand, seven hundred forty-five".