123454320999999 has 32 divisors (see below), whose sum is σ = 187390126080000. Its totient is φ = 71562827038560.

The previous prime is 123454320999929. The next prime is 123454321000079. The reversal of 123454320999999 is 999999023454321.

It is a Cunningham number, because it is equal to 11111000²-1.

It is not a de Polignac number, because 123454320999999 - 2⁸ = 123454320999743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123454320999929) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5555502 + ... + 16666500.

It is an arithmetic number, because the mean of its divisors is an integer number (5855941440000).

Almost surely, 2^{123454320999999} is an apocalyptic number.

123454320999999 is a deficient number, since it is larger than the sum of its proper divisors (63935805080001).

123454320999999 is a wasteful number, since it uses less digits than its factorization.

123454320999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11125675.

The product of its (nonzero) digits is 1530550080, while the sum is 78.

The spelling of 123454320999999 in words is "one hundred twenty-three trillion, four hundred fifty-four billion, three hundred twenty million, nine hundred ninety-nine thousand, nine hundred ninety-nine".