1243514678456 has 8 divisors (see below), whose sum is σ = 2331590022120. Its totient is φ = 621757339224.

The previous prime is 1243514678389. The next prime is 1243514678479. The reversal of 1243514678456 is 6548764153421.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77719667396 + ... + 77719667411.

It is an arithmetic number, because the mean of its divisors is an integer number (291448752765).

Almost surely, 2^{1243514678456} is an apocalyptic number.

It is an amenable number.

1243514678456 is a deficient number, since it is larger than the sum of its proper divisors (1088075343664).

1243514678456 is a wasteful number, since it uses less digits than its factorization.

1243514678456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155439334813 (or 155439334809 counting only the distinct ones).

The product of its digits is 19353600, while the sum is 56.

The spelling of 1243514678456 in words is "one trillion, two hundred forty-three billion, five hundred fourteen million, six hundred seventy-eight thousand, four hundred fifty-six".