1361558443 has 12 divisors (see below), whose sum is σ = 1603907040. Its totient is φ = 1152274032.

The previous prime is 1361558437. The next prime is 1361558447. The reversal of 1361558443 is 3448551631.

It is not a de Polignac number, because 1361558443 - 2²¹ = 1359461291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1361558396 and 1361558405.

It is not an unprimeable number, because it can be changed into a prime (1361558447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 171996 + ... + 179737.

It is an arithmetic number, because the mean of its divisors is an integer number (133658920).

Almost surely, 2^1361558443 is an apocalyptic number.

1361558443 is a deficient number, since it is larger than the sum of its proper divisors (242348597).

1361558443 is an equidigital number, since it uses as much as digits as its factorization.

1361558443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351826 (or 351819 counting only the distinct ones).

The product of its digits is 172800, while the sum is 40.

The square root of 1361558443 is about 36899.3013890507. The cubic root of 1361558443 is about 1108.3546879234.

The spelling of 1361558443 in words is "one billion, three hundred sixty-one million, five hundred fifty-eight thousand, four hundred forty-three".