122865566537 has 4 divisors (see below), whose sum is σ = 140417790336. Its totient is φ = 105313342740.

The previous prime is 122865566513. The next prime is 122865566581. The reversal of 122865566537 is 735665568221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 735665568221 = 1433 ⋅513374437.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122865566537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122865566507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8776111889 + ... + 8776111902.

It is an arithmetic number, because the mean of its divisors is an integer number (35104447584).

Almost surely, 2^122865566537 is an apocalyptic number.

It is an amenable number.

122865566537 is a deficient number, since it is larger than the sum of its proper divisors (17552223799).

122865566537 is an equidigital number, since it uses as much as digits as its factorization.

122865566537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17552223798.

The product of its digits is 18144000, while the sum is 56.

The spelling of 122865566537 in words is "one hundred twenty-two billion, eight hundred sixty-five million, five hundred sixty-six thousand, five hundred thirty-seven".