5115561623 has 2 divisors, whose sum is σ = 5115561624. Its totient is φ = 5115561622.

The previous prime is 5115561611. The next prime is 5115561637. The reversal of 5115561623 is 3261655115.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5115561623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5115561673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2557780811 + 2557780812.

It is an arithmetic number, because the mean of its divisors is an integer number (2557780812).

Almost surely, 2^5115561623 is an apocalyptic number.

5115561623 is a deficient number, since it is larger than the sum of its proper divisors (1).

5115561623 is an equidigital number, since it uses as much as digits as its factorization.

5115561623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27000, while the sum is 35.

The square root of 5115561623 is about 71523.1544536453. The cubic root of 5115561623 is about 1723.0495771417.

The spelling of 5115561623 in words is "five billion, one hundred fifteen million, five hundred sixty-one thousand, six hundred twenty-three".