6613123545 has 72 divisors (see below), whose sum is σ = 13352511744. Its totient is φ = 3018996288.

The previous prime is 6613123541. The next prime is 6613123567. The reversal of 6613123545 is 5453213166.

6613123545 is a `hidden beast` number, since 6 + 61 + 31 + 23 + 545 = 666.

6613123545 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6613123545 - 2² = 6613123541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6613123541) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2086552 + ... + 2089718.

It is an arithmetic number, because the mean of its divisors is an integer number (185451552).

Almost surely, 2^6613123545 is an apocalyptic number.

It is an amenable number.

6613123545 is an abundant number, since it is smaller than the sum of its proper divisors (6739388199).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6613123545 is a wasteful number, since it uses less digits than its factorization.

6613123545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4139 (or 4129 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 6613123545 is about 81321.1137712710. The cubic root of 6613123545 is about 1877.0199074713.

It can be divided in two parts, 66131 and 23545, that added together give a triangular number (89676 = T₄₂₃).

The spelling of 6613123545 in words is "six billion, six hundred thirteen million, one hundred twenty-three thousand, five hundred forty-five".