6451331653 has 4 divisors (see below), whose sum is σ = 6947587948. Its totient is φ = 5955075360.

The previous prime is 6451331647. The next prime is 6451331669. The reversal of 6451331653 is 3561331546.

It is a happy number.

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 4389990049 + 2061341604 = 66257^2 + 45402^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6451331653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6451331603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248128128 + ... + 248128153.

It is an arithmetic number, because the mean of its divisors is an integer number (1736896987).

Almost surely, 2^6451331653 is an apocalyptic number.

It is an amenable number.

6451331653 is a deficient number, since it is larger than the sum of its proper divisors (496256295).

6451331653 is a wasteful number, since it uses less digits than its factorization.

6451331653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496256294.

The product of its digits is 97200, while the sum is 37.

The square root of 6451331653 is about 80320.1821026322. The cubic root of 6451331653 is about 1861.5860804406.

The spelling of 6451331653 in words is "six billion, four hundred fifty-one million, three hundred thirty-one thousand, six hundred fifty-three".