5206771645 has 8 divisors (see below), whose sum is σ = 6615662904. Its totient is φ = 3920392704.

The previous prime is 5206771639. The next prime is 5206771649. The reversal of 5206771645 is 5461776025.

It can be written as a sum of positive squares in 4 ways, for example, as 77633721 + 5129137924 = 8811^2 + 71618^2 .

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 5206771645 - 2⁷ = 5206771517 is a prime.

It is a super-2 number, since 2×5206771645² = 54220941926352012050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5206771649) 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, 30627984 + ... + 30628153.

It is an arithmetic number, because the mean of its divisors is an integer number (826957863).

Almost surely, 2^5206771645 is an apocalyptic number.

It is an amenable number.

5206771645 is a deficient number, since it is larger than the sum of its proper divisors (1408891259).

5206771645 is a wasteful number, since it uses less digits than its factorization.

5206771645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61256159.

The product of its (nonzero) digits is 352800, while the sum is 43.

The square root of 5206771645 is about 72157.9631433704. The cubic root of 5206771645 is about 1733.2299182836.

The spelling of 5206771645 in words is "five billion, two hundred six million, seven hundred seventy-one thousand, six hundred forty-five".