1281156068116 has 12 divisors (see below), whose sum is σ = 2245842583488. Its totient is φ = 639486758552.

The previous prime is 1281156068029. The next prime is 1281156068119. The reversal of 1281156068116 is 6118606511821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281156068119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272816236 + ... + 272820931.

It is an arithmetic number, because the mean of its divisors is an integer number (187153548624).

Almost surely, 2^{1281156068116} is an apocalyptic number.

It is an amenable number.

1281156068116 is a deficient number, since it is larger than the sum of its proper divisors (964686515372).

1281156068116 is a wasteful number, since it uses less digits than its factorization.

1281156068116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545637758 (or 545637756 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 46.

The spelling of 1281156068116 in words is "one trillion, two hundred eighty-one billion, one hundred fifty-six million, sixty-eight thousand, one hundred sixteen".