6461766163 has 4 divisors (see below), whose sum is σ = 6486909480. Its totient is φ = 6436622848.

The previous prime is 6461766149. The next prime is 6461766169. The reversal of 6461766163 is 3616671646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6461766163 - 2¹³ = 6461757971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6461766169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12571273 + ... + 12571786.

It is an arithmetic number, because the mean of its divisors is an integer number (1621727370).

Almost surely, 2^6461766163 is an apocalyptic number.

6461766163 is a deficient number, since it is larger than the sum of its proper divisors (25143317).

6461766163 is a wasteful number, since it uses less digits than its factorization.

6461766163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25143316.

The product of its digits is 653184, while the sum is 46.

The square root of 6461766163 is about 80385.1115754653. Note that the first 3 decimals coincide. The cubic root of 6461766163 is about 1862.5891950617.

The spelling of 6461766163 in words is "six billion, four hundred sixty-one million, seven hundred sixty-six thousand, one hundred sixty-three".