123654542257 has 16 divisors (see below), whose sum is σ = 135006552000. Its totient is φ = 112808251584.

The previous prime is 123654542233. The next prime is 123654542269. The reversal of 123654542257 is 752245456321.

It is a cyclic number.

It is not a de Polignac number, because 123654542257 - 2¹¹ = 123654540209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123654542227) 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, 87238 + ... + 504895.

It is an arithmetic number, because the mean of its divisors is an integer number (8437909500).

Almost surely, 2^123654542257 is an apocalyptic number.

It is an amenable number.

123654542257 is a deficient number, since it is larger than the sum of its proper divisors (11352009743).

123654542257 is a wasteful number, since it uses less digits than its factorization.

123654542257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592560.

The product of its digits is 2016000, while the sum is 46.

Adding to 123654542257 its reverse (752245456321), we get a palindrome (875899998578).

The spelling of 123654542257 in words is "one hundred twenty-three billion, six hundred fifty-four million, five hundred forty-two thousand, two hundred fifty-seven".