5268921665 has 32 divisors (see below), whose sum is σ = 7581419520. Its totient is φ = 3439065600.

The previous prime is 5268921661. The next prime is 5268921683. The reversal of 5268921665 is 5661298625.

It is not a de Polignac number, because 5268921665 - 2² = 5268921661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5268921661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26381 + ... + 105989.

It is an arithmetic number, because the mean of its divisors is an integer number (236919360).

Almost surely, 2^5268921665 is an apocalyptic number.

It is an amenable number.

5268921665 is a deficient number, since it is larger than the sum of its proper divisors (2312497855).

5268921665 is a wasteful number, since it uses less digits than its factorization.

5268921665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79713.

The product of its digits is 1555200, while the sum is 50.

The square root of 5268921665 is about 72587.3381864909. The cubic root of 5268921665 is about 1740.0988256945.

The spelling of 5268921665 in words is "five billion, two hundred sixty-eight million, nine hundred twenty-one thousand, six hundred sixty-five".