1565972167 has 4 divisors (see below), whose sum is σ = 1566503640. Its totient is φ = 1565440696.

The previous prime is 1565972147. The next prime is 1565972197. The reversal of 1565972167 is 7612795651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7612795651 = 541 ⋅14071711.

It is a cyclic number.

It is not a de Polignac number, because 1565972167 - 2¹⁵ = 1565939399 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1565972167.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1565972147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261292 + ... + 267217.

It is an arithmetic number, because the mean of its divisors is an integer number (391625910).

Almost surely, 2^1565972167 is an apocalyptic number.

1565972167 is a deficient number, since it is larger than the sum of its proper divisors (531473).

1565972167 is an equidigital number, since it uses as much as digits as its factorization.

1565972167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531472.

The product of its digits is 793800, while the sum is 49.

The square root of 1565972167 is about 39572.3662042087. The cubic root of 1565972167 is about 1161.2561123194.

The spelling of 1565972167 in words is "one billion, five hundred sixty-five million, nine hundred seventy-two thousand, one hundred sixty-seven".