123355204250542 has 32 divisors (see below), whose sum is σ = 217350237565440. Its totient is φ = 51877834462080.

The previous prime is 123355204250489. The next prime is 123355204250543. The reversal of 123355204250542 is 245052402553321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123355204250543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2795119878 + ... + 2795164009.

It is an arithmetic number, because the mean of its divisors is an integer number (6792194923920).

Almost surely, 2^{123355204250542} is an apocalyptic number.

123355204250542 is a deficient number, since it is larger than the sum of its proper divisors (93995033314898).

123355204250542 is a wasteful number, since it uses less digits than its factorization.

123355204250542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5590283976.

The product of its (nonzero) digits is 1440000, while the sum is 43.

The spelling of 123355204250542 in words is "one hundred twenty-three trillion, three hundred fifty-five billion, two hundred four million, two hundred fifty thousand, five hundred forty-two".