165822555403 has 4 divisors (see below), whose sum is σ = 165823510720. Its totient is φ = 165821600088.

The previous prime is 165822555397. The next prime is 165822555443. The reversal of 165822555403 is 304555228561.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165822555403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165822555443) 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, 135675 + ... + 591652.

It is an arithmetic number, because the mean of its divisors is an integer number (41455877680).

Almost surely, 2^165822555403 is an apocalyptic number.

165822555403 is a deficient number, since it is larger than the sum of its proper divisors (955317).

165822555403 is an equidigital number, since it uses as much as digits as its factorization.

165822555403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955316.

The product of its (nonzero) digits is 1440000, while the sum is 46.

The spelling of 165822555403 in words is "one hundred sixty-five billion, eight hundred twenty-two million, five hundred fifty-five thousand, four hundred three".