123503243402890 has 32 divisors (see below), whose sum is σ = 244973875297536. Its totient is φ = 44540704595520.

The previous prime is 123503243402881. The next prime is 123503243402893. The reversal of 123503243402890 is 98204342305321.

It is a super-2 number, since 2×123503243402890² (a number of 29 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 123503243402890.

It is not an unprimeable number, because it can be changed into a prime (123503243402893) 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, 11046796146 + ... + 11046807325.

It is an arithmetic number, because the mean of its divisors is an integer number (7655433603048).

Almost surely, 2^{123503243402890} is an apocalyptic number.

123503243402890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123503243402890 is a deficient number, since it is larger than the sum of its proper divisors (121470631894646).

123503243402890 is a wasteful number, since it uses less digits than its factorization.

123503243402890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22093603534.

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 123503243402890 in words is "one hundred twenty-three trillion, five hundred three billion, two hundred forty-three million, four hundred two thousand, eight hundred ninety".