1565123996 has 12 divisors (see below), whose sum is σ = 2805771360. Its totient is φ = 763475040.

The previous prime is 1565123957. The next prime is 1565123999. The reversal of 1565123996 is 6993215651.

It is a super-2 number, since 2×1565123996² = 4899226245710016032, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1565123996.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1565123999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4771556 + ... + 4771883.

It is an arithmetic number, because the mean of its divisors is an integer number (233814280).

Almost surely, 2^1565123996 is an apocalyptic number.

It is an amenable number.

1565123996 is a deficient number, since it is larger than the sum of its proper divisors (1240647364).

1565123996 is a wasteful number, since it uses less digits than its factorization.

1565123996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9543484 (or 9543482 counting only the distinct ones).

The product of its digits is 437400, while the sum is 47.

The square root of 1565123996 is about 39561.6480445393. The cubic root of 1565123996 is about 1161.0464190149.

The spelling of 1565123996 in words is "one billion, five hundred sixty-five million, one hundred twenty-three thousand, nine hundred ninety-six".