123664087057 has 4 divisors (see below), whose sum is σ = 141330385216. Its totient is φ = 105997788900.

The previous prime is 123664087009. The next prime is 123664087087. The reversal of 123664087057 is 750780466321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 750780466321 = 83 ⋅9045547787.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123664087057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123664087057.

It is not an unprimeable number, because it can be changed into a prime (123664087087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8833149069 + ... + 8833149082.

It is an arithmetic number, because the mean of its divisors is an integer number (35332596304).

Almost surely, 2^123664087057 is an apocalyptic number.

It is an amenable number.

123664087057 is a deficient number, since it is larger than the sum of its proper divisors (17666298159).

123664087057 is an equidigital number, since it uses as much as digits as its factorization.

123664087057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17666298158.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 123664087057 in words is "one hundred twenty-three billion, six hundred sixty-four million, eighty-seven thousand, fifty-seven".