123654544957 has 2 divisors, whose sum is σ = 123654544958. Its totient is φ = 123654544956.

The previous prime is 123654544927. The next prime is 123654544963. The reversal of 123654544957 is 759445456321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120274401636 + 3380143321 = 346806^2 + 58139^2 .

It is an emirp because it is prime and its reverse (759445456321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123654544957 - 2³⁵ = 89294806589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123654544898 and 123654544907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123654544927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61827272478 + 61827272479.

It is an arithmetic number, because the mean of its divisors is an integer number (61827272479).

Almost surely, 2^123654544957 is an apocalyptic number.

It is an amenable number.

123654544957 is a deficient number, since it is larger than the sum of its proper divisors (1).

123654544957 is an equidigital number, since it uses as much as digits as its factorization.

123654544957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144000, while the sum is 55.

The spelling of 123654544957 in words is "one hundred twenty-three billion, six hundred fifty-four million, five hundred forty-four thousand, nine hundred fifty-seven".