6396478461 has 6 divisors (see below), whose sum is σ = 9239357790. Its totient is φ = 4264318968.

The previous prime is 6396478447. The next prime is 6396478477. The reversal of 6396478461 is 1648746936.

It can be written as a sum of positive squares in only one way, i.e., 4384955961 + 2011522500 = 66219^2 + 44850^2 .

It is not a de Polignac number, because 6396478461 - 2²³ = 6388089853 is a prime.

It is a super-3 number, since 3×6396478461³ (a number of 30 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6396478398 and 6396478407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6396458461) 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 in 5 ways as a sum of consecutive naturals, for example, 355359906 + ... + 355359923.

It is an arithmetic number, because the mean of its divisors is an integer number (1539892965).

Almost surely, 2^6396478461 is an apocalyptic number.

It is an amenable number.

6396478461 is a deficient number, since it is larger than the sum of its proper divisors (2842879329).

6396478461 is a wasteful number, since it uses less digits than its factorization.

6396478461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710719835 (or 710719832 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The square root of 6396478461 is about 79977.9873527710. The cubic root of 6396478461 is about 1856.2949389658.

The spelling of 6396478461 in words is "six billion, three hundred ninety-six million, four hundred seventy-eight thousand, four hundred sixty-one".