123345536257 has 4 divisors (see below), whose sum is σ = 125672810580. Its totient is φ = 121018261936.

The previous prime is 123345536221. The next prime is 123345536261. The reversal of 123345536257 is 752635543321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 752635543321 = 131 ⋅5745309491.

It can be written as a sum of positive squares in 2 ways, for example, as 84741538816 + 38603997441 = 291104^2 + 196479^2 .

It is a cyclic number.

It is not a de Polignac number, because 123345536257 - 2⁷ = 123345536129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123345536267) 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, 1163637082 + ... + 1163637187.

It is an arithmetic number, because the mean of its divisors is an integer number (31418202645).

Almost surely, 2^123345536257 is an apocalyptic number.

It is an amenable number.

123345536257 is a deficient number, since it is larger than the sum of its proper divisors (2327274323).

123345536257 is an equidigital number, since it uses as much as digits as its factorization.

123345536257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327274322.

The product of its digits is 2268000, while the sum is 46.

The spelling of 123345536257 in words is "one hundred twenty-three billion, three hundred forty-five million, five hundred thirty-six thousand, two hundred fifty-seven".