6543761953 has 2 divisors, whose sum is σ = 6543761954. Its totient is φ = 6543761952.

The previous prime is 6543761951. The next prime is 6543761981. The reversal of 6543761953 is 3591673456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3788771809 + 2754990144 = 61553^2 + 52488^2 .

It is a cyclic number.

It is not a de Polignac number, because 6543761953 - 2¹ = 6543761951 is a prime.

Together with 6543761951, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 6543761897 and 6543761906.

It is not a weakly prime, because it can be changed into another prime (6543761951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3271880976 + 3271880977.

It is an arithmetic number, because the mean of its divisors is an integer number (3271880977).

Almost surely, 2^6543761953 is an apocalyptic number.

It is an amenable number.

6543761953 is a deficient number, since it is larger than the sum of its proper divisors (1).

6543761953 is an equidigital number, since it uses as much as digits as its factorization.

6543761953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2041200, while the sum is 49.

The square root of 6543761953 is about 80893.5223179211. The cubic root of 6543761953 is about 1870.4344699545.

The spelling of 6543761953 in words is "six billion, five hundred forty-three million, seven hundred sixty-one thousand, nine hundred fifty-three".