5515610123 has 2 divisors, whose sum is σ = 5515610124. Its totient is φ = 5515610122.

The previous prime is 5515610099. The next prime is 5515610147. The reversal of 5515610123 is 3210165155.

It is a balanced prime because it is at equal distance from previous prime (5515610099) and next prime (5515610147).

It is a cyclic number.

It is not a de Polignac number, because 5515610123 - 2¹⁸ = 5515347979 is a prime.

It is not a weakly prime, because it can be changed into another prime (5515610323) 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 as a sum of consecutive naturals, namely, 2757805061 + 2757805062.

It is an arithmetic number, because the mean of its divisors is an integer number (2757805062).

Almost surely, 2^5515610123 is an apocalyptic number.

5515610123 is a deficient number, since it is larger than the sum of its proper divisors (1).

5515610123 is an equidigital number, since it uses as much as digits as its factorization.

5515610123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 5515610123 is about 74267.1537289534. The cubic root of 5515610123 is about 1766.8425651410.

Adding to 5515610123 its reverse (3210165155), we get a palindrome (8725775278).

The spelling of 5515610123 in words is "five billion, five hundred fifteen million, six hundred ten thousand, one hundred twenty-three".