123355047742 has 8 divisors (see below), whose sum is σ = 186167741256. Its totient is φ = 61299133992.

The previous prime is 123355047721. The next prime is 123355047757. The reversal of 123355047742 is 247740553321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 189194533 + ... + 189195184.

It is an arithmetic number, because the mean of its divisors is an integer number (23270967657).

Almost surely, 2^123355047742 is an apocalyptic number.

123355047742 is a deficient number, since it is larger than the sum of its proper divisors (62812693514).

123355047742 is a wasteful number, since it uses less digits than its factorization.

123355047742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378389882.

The product of its (nonzero) digits is 705600, while the sum is 43.

The spelling of 123355047742 in words is "one hundred twenty-three billion, three hundred fifty-five million, forty-seven thousand, seven hundred forty-two".