6451514645 has 4 divisors (see below), whose sum is σ = 7741817580. Its totient is φ = 5161211712.

The previous prime is 6451514639. The next prime is 6451514647. The reversal of 6451514645 is 5464151546.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3816027076 + 2635487569 = 61774^2 + 51337^2 .

It is a cyclic number.

It is not a de Polignac number, because 6451514645 - 2¹⁸ = 6451252501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6451514647) 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, 645151460 + ... + 645151469.

It is an arithmetic number, because the mean of its divisors is an integer number (1935454395).

Almost surely, 2^6451514645 is an apocalyptic number.

It is an amenable number.

6451514645 is a deficient number, since it is larger than the sum of its proper divisors (1290302935).

6451514645 is a wasteful number, since it uses less digits than its factorization.

6451514645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290302934.

The product of its digits is 288000, while the sum is 41.

The square root of 6451514645 is about 80321.3212353980. The cubic root of 6451514645 is about 1861.6036815684.

The spelling of 6451514645 in words is "six billion, four hundred fifty-one million, five hundred fourteen thousand, six hundred forty-five".