51443265653 has 8 divisors (see below), whose sum is σ = 55402339608. Its totient is φ = 47484463104.

The previous prime is 51443265613. The next prime is 51443265683. The reversal of 51443265653 is 35656234415.

It can be written as a sum of positive squares in 4 ways, for example, as 13174907524 + 38268358129 = 114782^2 + 195623^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51443265653 - 2¹² = 51443261557 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 (51443265613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505001 + ... + 598257.

It is an arithmetic number, because the mean of its divisors is an integer number (6925292451).

Almost surely, 2^51443265653 is an apocalyptic number.

It is an amenable number.

51443265653 is a deficient number, since it is larger than the sum of its proper divisors (3959073955).

51443265653 is a wasteful number, since it uses less digits than its factorization.

51443265653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135703.

The product of its digits is 1296000, while the sum is 44.

It can be divided in two parts, 514432 and 65653, that added together give a palindrome (580085).

The spelling of 51443265653 in words is "fifty-one billion, four hundred forty-three million, two hundred sixty-five thousand, six hundred fifty-three".