6497667945 has 48 divisors (see below), whose sum is σ = 11432238480. Its totient is φ = 3413532672.

The previous prime is 6497667929. The next prime is 6497667961. The reversal of 6497667945 is 5497667946.

It is an interprime number because it is at equal distance from previous prime (6497667929) and next prime (6497667961).

It can be written as a sum of positive squares in 8 ways, for example, as 127712601 + 6369955344 = 11301^2 + 79812^2 .

It is not a de Polignac number, because 6497667945 - 2⁴ = 6497667929 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1106457 + ... + 1112313.

It is an arithmetic number, because the mean of its divisors is an integer number (238171635).

Almost surely, 2^6497667945 is an apocalyptic number.

It is an amenable number.

6497667945 is a deficient number, since it is larger than the sum of its proper divisors (4934570535).

6497667945 is a wasteful number, since it uses less digits than its factorization.

6497667945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6234 (or 6231 counting only the distinct ones).

The product of its digits is 68584320, while the sum is 63.

The square root of 6497667945 is about 80608.1133943724. The cubic root of 6497667945 is about 1866.0323614215.

Subtracting from 6497667945 its reverse (5497667946), we obtain a palindrome (999999999).

The spelling of 6497667945 in words is "six billion, four hundred ninety-seven million, six hundred sixty-seven thousand, nine hundred forty-five".