123531045738 has 64 divisors (see below), whose sum is σ = 251652167040. Its totient is φ = 40418030592.

The previous prime is 123531045709. The next prime is 123531045739. The reversal of 123531045738 is 837540135321.

It is a super-2 number, since 2×123531045738² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123531045738.

It is not an unprimeable number, because it can be changed into a prime (123531045739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123902256 + ... + 123903252.

It is an arithmetic number, because the mean of its divisors is an integer number (3932065110).

Almost surely, 2^123531045738 is an apocalyptic number.

123531045738 is an abundant number, since it is smaller than the sum of its proper divisors (128121121302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123531045738 is a wasteful number, since it uses less digits than its factorization.

123531045738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151.

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 123531045738 in words is "one hundred twenty-three billion, five hundred thirty-one million, forty-five thousand, seven hundred thirty-eight".