5165643261 has 8 divisors (see below), whose sum is σ = 6893739360. Its totient is φ = 3440654672.

The previous prime is 5165643257. The next prime is 5165643271. The reversal of 5165643261 is 1623465615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5165643261 - 2² = 5165643257 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5165643211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 772995 + ... + 779648.

It is an arithmetic number, because the mean of its divisors is an integer number (861717420).

Almost surely, 2^5165643261 is an apocalyptic number.

It is an amenable number.

5165643261 is a deficient number, since it is larger than the sum of its proper divisors (1728096099).

5165643261 is a wasteful number, since it uses less digits than its factorization.

5165643261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553755.

The product of its digits is 129600, while the sum is 39.

The square root of 5165643261 is about 71872.4095950595. The cubic root of 5165643261 is about 1728.6542443834.

The spelling of 5165643261 in words is "five billion, one hundred sixty-five million, six hundred forty-three thousand, two hundred sixty-one".