51534733765 has 8 divisors (see below), whose sum is σ = 63974152440. Its totient is φ = 39806139072.

The previous prime is 51534733753. The next prime is 51534733769. The reversal of 51534733765 is 56733743515.

It can be written as a sum of positive squares in 4 ways, for example, as 17743838436 + 33790895329 = 133206^2 + 183823^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51534733765 - 2⁹ = 51534733253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51534733769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177705834 + ... + 177706123.

It is an arithmetic number, because the mean of its divisors is an integer number (7996769055).

Almost surely, 2^51534733765 is an apocalyptic number.

It is an amenable number.

51534733765 is a deficient number, since it is larger than the sum of its proper divisors (12439418675).

51534733765 is a wasteful number, since it uses less digits than its factorization.

51534733765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355411991.

The product of its digits is 3969000, while the sum is 49.

The spelling of 51534733765 in words is "fifty-one billion, five hundred thirty-four million, seven hundred thirty-three thousand, seven hundred sixty-five".