123280585749 has 48 divisors (see below), whose sum is σ = 188984689920. Its totient is φ = 77321623680.

The previous prime is 123280585721. The next prime is 123280585823. The reversal of 123280585749 is 947585082321.

123280585749 is a `hidden beast` number, since 12 + 3 + 2 + 8 + 0 + 58 + 574 + 9 = 666.

It is not a de Polignac number, because 123280585749 - 2⁷ = 123280585621 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 123280585695 and 123280585704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123280585249) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1667364 + ... + 1739730.

It is an arithmetic number, because the mean of its divisors is an integer number (3937181040).

Almost surely, 2^123280585749 is an apocalyptic number.

It is an amenable number.

123280585749 is a deficient number, since it is larger than the sum of its proper divisors (65704104171).

123280585749 is a wasteful number, since it uses less digits than its factorization.

123280585749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72570 (or 72567 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The spelling of 123280585749 in words is "one hundred twenty-three billion, two hundred eighty million, five hundred eighty-five thousand, seven hundred forty-nine".