1231454543394 has 16 divisors (see below), whose sum is σ = 2463114970080. Its totient is φ = 410450533920.

The previous prime is 1231454543381. The next prime is 1231454543411. The reversal of 1231454543394 is 4933454541321.

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 7 ways as a sum of consecutive naturals, for example, 8500659 + ... + 8644310.

It is an arithmetic number, because the mean of its divisors is an integer number (153944685630).

Almost surely, 2^{1231454543394} is an apocalyptic number.

1231454543394 is an abundant number, since it is smaller than the sum of its proper divisors (1231660426686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231454543394 is a wasteful number, since it uses less digits than its factorization.

1231454543394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17156945.

The product of its digits is 3110400, while the sum is 48.

The spelling of 1231454543394 in words is "one trillion, two hundred thirty-one billion, four hundred fifty-four million, five hundred forty-three thousand, three hundred ninety-four".