1565740801 has 16 divisors (see below), whose sum is σ = 1669764096. Its totient is φ = 1465071696.

The previous prime is 1565740793. The next prime is 1565740849. The reversal of 1565740801 is 1080475651.

It is a cyclic number.

It is not a de Polignac number, because 1565740801 - 2³ = 1565740793 is a prime.

It is a super-2 number, since 2×1565740801² = 4903088511832243202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1565740301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192646 + ... + 200608.

It is an arithmetic number, because the mean of its divisors is an integer number (104360256).

Almost surely, 2^1565740801 is an apocalyptic number.

It is an amenable number.

1565740801 is a deficient number, since it is larger than the sum of its proper divisors (104023295).

1565740801 is a wasteful number, since it uses less digits than its factorization.

1565740801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8172.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 1565740801 is about 39569.4427683787. The cubic root of 1565740801 is about 1161.1989192180.

The spelling of 1565740801 in words is "one billion, five hundred sixty-five million, seven hundred forty thousand, eight hundred one".