123681052469 has 16 divisors (see below), whose sum is σ = 134470180992. Its totient is φ = 113078887488.

The previous prime is 123681052427. The next prime is 123681052487. The reversal of 123681052469 is 964250186321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123681052469 is a prime.

It is a super-2 number, since 2×123681052469² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123681052169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 521264 + ... + 720470.

It is an arithmetic number, because the mean of its divisors is an integer number (8404386312).

Almost surely, 2^123681052469 is an apocalyptic number.

It is an amenable number.

123681052469 is a deficient number, since it is larger than the sum of its proper divisors (10789128523).

123681052469 is a wasteful number, since it uses less digits than its factorization.

123681052469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199676.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 123681052469 in words is "one hundred twenty-three billion, six hundred eighty-one million, fifty-two thousand, four hundred sixty-nine".