1243565012156 has 12 divisors (see below), whose sum is σ = 2304252816768. Its totient is φ = 585207064512.

The previous prime is 1243565012113. The next prime is 1243565012167. The reversal of 1243565012156 is 6512105653421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9143860316 + ... + 9143860451.

It is an arithmetic number, because the mean of its divisors is an integer number (192021068064).

Almost surely, 2^{1243565012156} is an apocalyptic number.

It is an amenable number.

1243565012156 is a deficient number, since it is larger than the sum of its proper divisors (1060687804612).

1243565012156 is a wasteful number, since it uses less digits than its factorization.

1243565012156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18287720788 (or 18287720786 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 1243565012156 in words is "one trillion, two hundred forty-three billion, five hundred sixty-five million, twelve thousand, one hundred fifty-six".