5515645423 has 4 divisors (see below), whose sum is σ = 5516370640. Its totient is φ = 5514920208.

The previous prime is 5515645361. The next prime is 5515645501. The reversal of 5515645423 is 3245465155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5515645423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5515640423) 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, 351078 + ... + 366451.

It is an arithmetic number, because the mean of its divisors is an integer number (1379092660).

Almost surely, 2^5515645423 is an apocalyptic number.

5515645423 is a deficient number, since it is larger than the sum of its proper divisors (725217).

5515645423 is an equidigital number, since it uses as much as digits as its factorization.

5515645423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725216.

The product of its digits is 360000, while the sum is 40.

The square root of 5515645423 is about 74267.3913841061. The cubic root of 5515645423 is about 1766.8463344073.

The spelling of 5515645423 in words is "five billion, five hundred fifteen million, six hundred forty-five thousand, four hundred twenty-three".