1565380349 has 24 divisors (see below), whose sum is σ = 1839354888. Its totient is φ = 1323095040.

The previous prime is 1565380343. The next prime is 1565380373. The reversal of 1565380349 is 9430835651.

It can be written as a sum of positive squares in 12 ways, for example, as 120012025 + 1445368324 = 10955^2 + 38018^2 .

It is not a de Polignac number, because 1565380349 - 2¹⁶ = 1565314813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1565380343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133379 + ... + 144639.

It is an arithmetic number, because the mean of its divisors is an integer number (76639787).

Almost surely, 2^1565380349 is an apocalyptic number.

It is an amenable number.

1565380349 is a deficient number, since it is larger than the sum of its proper divisors (273974539).

1565380349 is a wasteful number, since it uses less digits than its factorization.

1565380349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11345 (or 11328 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 44.

The square root of 1565380349 is about 39564.8878299939. The cubic root of 1565380349 is about 1161.1098051502.

The spelling of 1565380349 in words is "one billion, five hundred sixty-five million, three hundred eighty thousand, three hundred forty-nine".