1355863808831 has 4 divisors (see below), whose sum is σ = 1549558638672. Its totient is φ = 1162168978992.

The previous prime is 1355863808779. The next prime is 1355863808869. The reversal of 1355863808831 is 1388083685531.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1355863808831 - 2¹⁰ = 1355863807807 is a prime.

It is a super-2 number, since 2×1355863808831² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355863858831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96847414910 + ... + 96847414923.

It is an arithmetic number, because the mean of its divisors is an integer number (387389659668).

Almost surely, 2^{1355863808831} is an apocalyptic number.

1355863808831 is a deficient number, since it is larger than the sum of its proper divisors (193694829841).

1355863808831 is an equidigital number, since it uses as much as digits as its factorization.

1355863808831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193694829840.

The product of its (nonzero) digits is 16588800, while the sum is 59.

The spelling of 1355863808831 in words is "one trillion, three hundred fifty-five billion, eight hundred sixty-three million, eight hundred eight thousand, eight hundred thirty-one".