123931510406 has 64 divisors (see below), whose sum is σ = 220686681600. Its totient is φ = 51587539200.

The previous prime is 123931510403. The next prime is 123931510421. The reversal of 123931510406 is 604015139321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123931510403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1834871 + ... + 1901213.

It is an arithmetic number, because the mean of its divisors is an integer number (3448229400).

Almost surely, 2^123931510406 is an apocalyptic number.

123931510406 is a deficient number, since it is larger than the sum of its proper divisors (96755171194).

123931510406 is a wasteful number, since it uses less digits than its factorization.

123931510406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66525.

The product of its (nonzero) digits is 19440, while the sum is 35.

Adding to 123931510406 its reverse (604015139321), we get a palindrome (727946649727).

The spelling of 123931510406 in words is "one hundred twenty-three billion, nine hundred thirty-one million, five hundred ten thousand, four hundred six".