1361505299 has 64 divisors (see below), whose sum is σ = 1864166400. Its totient is φ = 965491200.

The previous prime is 1361505293. The next prime is 1361505307. The reversal of 1361505299 is 9925051631.

It is a happy number.

It is not a de Polignac number, because 1361505299 - 2⁴ = 1361505283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361505293) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22319729 + ... + 22319789.

It is an arithmetic number, because the mean of its divisors is an integer number (29127600).

Almost surely, 2^1361505299 is an apocalyptic number.

1361505299 is a deficient number, since it is larger than the sum of its proper divisors (502661101).

1361505299 is an equidigital number, since it uses as much as digits as its factorization.

1361505299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 41.

The square root of 1361505299 is about 36898.5812599888. The cubic root of 1361505299 is about 1108.3402673971.

The spelling of 1361505299 in words is "one billion, three hundred sixty-one million, five hundred five thousand, two hundred ninety-nine".