5135123665 has 16 divisors (see below), whose sum is σ = 7044992640. Its totient is φ = 3519959040.

The previous prime is 5135123663. The next prime is 5135123677. The reversal of 5135123665 is 5663215315.

It is not a de Polignac number, because 5135123665 - 2¹ = 5135123663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5135123663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77905 + ... + 127825.

It is an arithmetic number, because the mean of its divisors is an integer number (440312040).

Almost surely, 2^5135123665 is an apocalyptic number.

It is an amenable number.

5135123665 is a deficient number, since it is larger than the sum of its proper divisors (1909868975).

5135123665 is a wasteful number, since it uses less digits than its factorization.

5135123665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52872.

The product of its digits is 81000, while the sum is 37.

The square root of 5135123665 is about 71659.7771766003. Note that the first 3 decimals coincide. The cubic root of 5135123665 is about 1725.2431124133.

The spelling of 5135123665 in words is "five billion, one hundred thirty-five million, one hundred twenty-three thousand, six hundred sixty-five".