1275852785858 has 48 divisors (see below), whose sum is σ = 2333638641600. Its totient is φ = 512362235136.

The previous prime is 1275852785783. The next prime is 1275852785891. The reversal of 1275852785858 is 8585872585721.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1275852785791 and 1275852785800.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 223868 + ... + 1613016.

It is an arithmetic number, because the mean of its divisors is an integer number (48617471700).

Almost surely, 2^{1275852785858} is an apocalyptic number.

1275852785858 is a deficient number, since it is larger than the sum of its proper divisors (1057785855742).

1275852785858 is a wasteful number, since it uses less digits than its factorization.

1275852785858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389419 (or 1389402 counting only the distinct ones).

The product of its digits is 501760000, while the sum is 71.

The spelling of 1275852785858 in words is "one trillion, two hundred seventy-five billion, eight hundred fifty-two million, seven hundred eighty-five thousand, eight hundred fifty-eight".