1361543545 has 8 divisors (see below), whose sum is σ = 1640988360. Its totient is φ = 1084477440.

The previous prime is 1361543497. The next prime is 1361543551. The reversal of 1361543545 is 5453451631.

It can be written as a sum of positive squares in 4 ways, for example, as 134652816 + 1226890729 = 11604^2 + 35027^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1361543545 - 2²¹ = 1359446393 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 593416 + ... + 595705.

It is an arithmetic number, because the mean of its divisors is an integer number (205123545).

Almost surely, 2^1361543545 is an apocalyptic number.

It is an amenable number.

1361543545 is a deficient number, since it is larger than the sum of its proper divisors (279444815).

1361543545 is a wasteful number, since it uses less digits than its factorization.

1361543545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189355.

The product of its digits is 108000, while the sum is 37.

The square root of 1361543545 is about 36899.0995147578. The cubic root of 1361543545 is about 1108.3506454165.

The spelling of 1361543545 in words is "one billion, three hundred sixty-one million, five hundred forty-three thousand, five hundred forty-five".