1565913601 has 8 divisors (see below), whose sum is σ = 1790527680. Its totient is φ = 1341527568.

The previous prime is 1565913553. The next prime is 1565913637. The reversal of 1565913601 is 1063195651.

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

It is a cyclic number.

It is not a de Polignac number, because 1565913601 - 2⁷ = 1565913473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1565911601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42031 + ... + 69988.

It is an arithmetic number, because the mean of its divisors is an integer number (223815960).

Almost surely, 2^1565913601 is an apocalyptic number.

It is an amenable number.

1565913601 is a deficient number, since it is larger than the sum of its proper divisors (224614079).

1565913601 is a wasteful number, since it uses less digits than its factorization.

1565913601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114023.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 1565913601 is about 39571.6262112135. The cubic root of 1565913601 is about 1161.2416354820.

The spelling of 1565913601 in words is "one billion, five hundred sixty-five million, nine hundred thirteen thousand, six hundred one".