1565660601 has 12 divisors (see below), whose sum is σ = 2261875200. Its totient is φ = 1043605080.

The previous prime is 1565660581. The next prime is 1565660627. The reversal of 1565660601 is 1060665651.

It is not a de Polignac number, because 1565660601 - 2²³ = 1557271993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1565660501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73336 + ... + 92246.

It is an arithmetic number, because the mean of its divisors is an integer number (188489600).

Almost surely, 2^1565660601 is an apocalyptic number.

It is an amenable number.

1565660601 is a deficient number, since it is larger than the sum of its proper divisors (696214599).

1565660601 is a wasteful number, since it uses less digits than its factorization.

1565660601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28116 (or 28113 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 1565660601 is about 39568.4293471449. The cubic root of 1565660601 is about 1161.1790926619.

The spelling of 1565660601 in words is "one billion, five hundred sixty-five million, six hundred sixty thousand, six hundred one".