6387456961 has 2 divisors, whose sum is σ = 6387456962. Its totient is φ = 6387456960.

The previous prime is 6387456899. The next prime is 6387456989. The reversal of 6387456961 is 1696547836.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5918994225 + 468462736 = 76935^2 + 21644^2 .

It is a cyclic number.

It is not a de Polignac number, because 6387456961 - 2⁷ = 6387456833 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (6387436961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3193728480 + 3193728481.

It is an arithmetic number, because the mean of its divisors is an integer number (3193728481).

Almost surely, 2^6387456961 is an apocalyptic number.

It is an amenable number.

6387456961 is a deficient number, since it is larger than the sum of its proper divisors (1).

6387456961 is an equidigital number, since it uses as much as digits as its factorization.

6387456961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 55.

The square root of 6387456961 is about 79921.5675584507. The cubic root of 6387456961 is about 1855.4218312547.

The spelling of 6387456961 in words is "six billion, three hundred eighty-seven million, four hundred fifty-six thousand, nine hundred sixty-one".