6551572117 has 2 divisors, whose sum is σ = 6551572118. Its totient is φ = 6551572116.

The previous prime is 6551572031. The next prime is 6551572123. The reversal of 6551572117 is 7112751556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4549367601 + 2002204516 = 67449^2 + 44746^2 .

It is a cyclic number.

It is not a de Polignac number, because 6551572117 - 2²³ = 6543183509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6551572117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6551572177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3275786058 + 3275786059.

It is an arithmetic number, because the mean of its divisors is an integer number (3275786059).

Almost surely, 2^6551572117 is an apocalyptic number.

It is an amenable number.

6551572117 is a deficient number, since it is larger than the sum of its proper divisors (1).

6551572117 is an equidigital number, since it uses as much as digits as its factorization.

6551572117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73500, while the sum is 40.

The square root of 6551572117 is about 80941.7822697277. The cubic root of 6551572117 is about 1871.1783128220.

The spelling of 6551572117 in words is "six billion, five hundred fifty-one million, five hundred seventy-two thousand, one hundred seventeen".