623166145 has 16 divisors (see below), whose sum is σ = 855290880. Its totient is φ = 426982464.

The previous prime is 623166143. The next prime is 623166149. The reversal of 623166145 is 541661326.

It is a cyclic number.

It is not a de Polignac number, because 623166145 - 2¹ = 623166143 is a prime.

It is a super-2 number, since 2×623166145² = 776672088548322050, 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 623166145.

It is not an unprimeable number, because it can be changed into a prime (623166143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44179 + ... + 56551.

It is an arithmetic number, because the mean of its divisors is an integer number (53455680).

Almost surely, 2^623166145 is an apocalyptic number.

It is an amenable number.

623166145 is a deficient number, since it is larger than the sum of its proper divisors (232124735).

623166145 is a wasteful number, since it uses less digits than its factorization.

623166145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13824.

The product of its digits is 25920, while the sum is 34.

The square root of 623166145 is about 24963.2959562635. The cubic root of 623166145 is about 854.1509280093.

The spelling of 623166145 in words is "six hundred twenty-three million, one hundred sixty-six thousand, one hundred forty-five".