123745522687 has 4 divisors (see below), whose sum is σ = 123926702760. Its totient is φ = 123564342616.

The previous prime is 123745522669. The next prime is 123745522697. The reversal of 123745522687 is 786225547321.

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

It is a cyclic number.

It is not a de Polignac number, because 123745522687 - 2¹⁵ = 123745489919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123745522697) 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, 90589012 + ... + 90590377.

It is an arithmetic number, because the mean of its divisors is an integer number (30981675690).

Almost surely, 2^123745522687 is an apocalyptic number.

123745522687 is a deficient number, since it is larger than the sum of its proper divisors (181180073).

123745522687 is an equidigital number, since it uses as much as digits as its factorization.

123745522687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181180072.

The product of its digits is 5644800, while the sum is 52.

The spelling of 123745522687 in words is "one hundred twenty-three billion, seven hundred forty-five million, five hundred twenty-two thousand, six hundred eighty-seven".