6453640712 has 8 divisors (see below), whose sum is σ = 12100576350. Its totient is φ = 3226820352.

The previous prime is 6453640709. The next prime is 6453640727. The reversal of 6453640712 is 2170463546.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4538177956 + 1915462756 = 67366^2 + 43766^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403352537 + ... + 403352552.

Almost surely, 2^6453640712 is an apocalyptic number.

It is an amenable number.

6453640712 is a deficient number, since it is larger than the sum of its proper divisors (5646935638).

6453640712 is a wasteful number, since it uses less digits than its factorization.

6453640712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806705095 (or 806705091 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 6453640712 is about 80334.5549063415. The cubic root of 6453640712 is about 1861.8081534215.

The spelling of 6453640712 in words is "six billion, four hundred fifty-three million, six hundred forty thousand, seven hundred twelve".