1311666402125 has 16 divisors (see below), whose sum is σ = 1641905219136. Its totient is φ = 1046162898000.

The previous prime is 1311666402103. The next prime is 1311666402133. The reversal of 1311666402125 is 5212046661131.

It is not a de Polignac number, because 1311666402125 - 2⁶ = 1311666402061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15809579 + ... + 15892328.

It is an arithmetic number, because the mean of its divisors is an integer number (102619076196).

Almost surely, 2^{1311666402125} is an apocalyptic number.

It is an amenable number.

1311666402125 is a deficient number, since it is larger than the sum of its proper divisors (330238817011).

1311666402125 is an equidigital number, since it uses as much as digits as its factorization.

1311666402125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31702253 (or 31702243 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 1311666402125 in words is "one trillion, three hundred eleven billion, six hundred sixty-six million, four hundred two thousand, one hundred twenty-five".