12344456678890 has 16 divisors (see below), whose sum is σ = 25394310882432. Its totient is φ = 4232385147024.

The previous prime is 12344456678839. The next prime is 12344456678903. The reversal of 12344456678890 is 9887665444321.

It is a super-2 number, since 2×12344456678890² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88174690494 + ... + 88174690633.

It is an arithmetic number, because the mean of its divisors is an integer number (1587144430152).

It is a 2-persistent number, because it is pandigital, and so is 2⋅12344456678890 = 24688913357780, but 3⋅12344456678890 = 37033370036670 is not.

Almost surely, 2^{12344456678890} is an apocalyptic number.

12344456678890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12344456678890 is an abundant number, since it is smaller than the sum of its proper divisors (13049854203542).

12344456678890 is a wasteful number, since it uses less digits than its factorization.

12344456678890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176349381141.

The product of its (nonzero) digits is 278691840, while the sum is 67.

The spelling of 12344456678890 in words is "twelve trillion, three hundred forty-four billion, four hundred fifty-six million, six hundred seventy-eight thousand, eight hundred ninety".