123631042004 has 12 divisors (see below), whose sum is σ = 216372690324. Its totient is φ = 61810273344.

The previous prime is 123631041967. The next prime is 123631042009. The reversal of 123631042004 is 400240136321.

It can be written as a sum of positive squares in 2 ways, for example, as 117093996100 + 6537045904 = 342190^2 + 80852^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123631042009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1258667 + ... + 1353330.

It is an arithmetic number, because the mean of its divisors is an integer number (18031057527).

Almost surely, 2^123631042004 is an apocalyptic number.

It is an amenable number.

123631042004 is a deficient number, since it is larger than the sum of its proper divisors (92741648320).

123631042004 is a wasteful number, since it uses less digits than its factorization.

123631042004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623834 (or 2623832 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 123631042004 its reverse (400240136321), we get a palindrome (523871178325).

The spelling of 123631042004 in words is "one hundred twenty-three billion, six hundred thirty-one million, forty-two thousand, four".