123780504956659 has 2 divisors, whose sum is σ = 123780504956660. Its totient is φ = 123780504956658.

The previous prime is 123780504956629. The next prime is 123780504956791. The reversal of 123780504956659 is 956659405087321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123780504956659 - 2⁵ = 123780504956627 is a prime.

It is a super-2 number, since 2×123780504956659² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123780504956629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61890252478329 + 61890252478330.

It is an arithmetic number, because the mean of its divisors is an integer number (61890252478330).

It is a 2-persistent number, because it is pandigital, and so is 2⋅123780504956659 = 247561009913318, but 3⋅123780504956659 = 371341514869977 is not.

Almost surely, 2^{123780504956659} is an apocalyptic number.

123780504956659 is a deficient number, since it is larger than the sum of its proper divisors (1).

123780504956659 is an equidigital number, since it uses as much as digits as its factorization.

123780504956659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888000, while the sum is 70.

The spelling of 123780504956659 in words is "one hundred twenty-three trillion, seven hundred eighty billion, five hundred four million, nine hundred fifty-six thousand, six hundred fifty-nine".