1611122623 has 24 divisors (see below), whose sum is σ = 1880247600. Its totient is φ = 1374700800.

The previous prime is 1611122587. The next prime is 1611122659. The reversal of 1611122623 is 3262211161.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1611122587) and next prime (1611122659).

It is a de Polignac number, because none of the positive numbers 2^k-1611122623 is a prime.

It is a super-2 number, since 2×1611122623² = 5191432212684800258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611122663) 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 23 ways as a sum of consecutive naturals, for example, 947428 + ... + 949126.

It is an arithmetic number, because the mean of its divisors is an integer number (78343650).

Almost surely, 2^1611122623 is an apocalyptic number.

1611122623 is a deficient number, since it is larger than the sum of its proper divisors (269124977).

1611122623 is a wasteful number, since it uses less digits than its factorization.

1611122623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2199 (or 2188 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 1611122623 is about 40138.7919972687. The cubic root of 1611122623 is about 1172.3110681618.

Adding to 1611122623 its reverse (3262211161), we get a palindrome (4873333784).

The spelling of 1611122623 in words is "one billion, six hundred eleven million, one hundred twenty-two thousand, six hundred twenty-three".