1355891266827 has 24 divisors (see below), whose sum is σ = 1959648949440. Its totient is φ = 903401858160.

The previous prime is 1355891266789. The next prime is 1355891266841. The reversal of 1355891266827 is 7286621985531.

1355891266827 is a `hidden beast` number, since 1 + 3 + 5 + 589 + 1 + 26 + 6 + 8 + 27 = 666.

It is not a de Polignac number, because 1355891266827 - 2⁸ = 1355891266571 is a prime.

It is a super-2 number, since 2×1355891266827² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1355891266127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 206341452 + ... + 206348022.

It is an arithmetic number, because the mean of its divisors is an integer number (81652039560).

Almost surely, 2^{1355891266827} is an apocalyptic number.

1355891266827 is a deficient number, since it is larger than the sum of its proper divisors (603757682613).

1355891266827 is a wasteful number, since it uses less digits than its factorization.

1355891266827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16423 (or 16420 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 63.

The spelling of 1355891266827 in words is "one trillion, three hundred fifty-five billion, eight hundred ninety-one million, two hundred sixty-six thousand, eight hundred twenty-seven".