1318945075646 has 12 divisors (see below), whose sum is σ = 2174624319336. Its totient is φ = 599520488820.

The previous prime is 1318945075639. The next prime is 1318945075661. The reversal of 1318945075646 is 6465705498131.

It is a super-2 number, since 2×1318945075646² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2725092890 + ... + 2725093373.

It is an arithmetic number, because the mean of its divisors is an integer number (181218693278).

Almost surely, 2^{1318945075646} is an apocalyptic number.

1318945075646 is a deficient number, since it is larger than the sum of its proper divisors (855679243690).

1318945075646 is a wasteful number, since it uses less digits than its factorization.

1318945075646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5450186287 (or 5450186276 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 59.

The spelling of 1318945075646 in words is "one trillion, three hundred eighteen billion, nine hundred forty-five million, seventy-five thousand, six hundred forty-six".