1355501237891 has 2 divisors, whose sum is σ = 1355501237892. Its totient is φ = 1355501237890.

The previous prime is 1355501237851. The next prime is 1355501237933. The reversal of 1355501237891 is 1987321055531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1355501237891 - 2¹⁸ = 1355500975747 is a prime.

It is not a weakly prime, because it can be changed into another prime (1355501237851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677750618945 + 677750618946.

It is an arithmetic number, because the mean of its divisors is an integer number (677750618946).

Almost surely, 2^{1355501237891} is an apocalyptic number.

1355501237891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355501237891 is an equidigital number, since it uses as much as digits as its factorization.

1355501237891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134000, while the sum is 50.

The spelling of 1355501237891 in words is "one trillion, three hundred fifty-five billion, five hundred one million, two hundred thirty-seven thousand, eight hundred ninety-one".