51355287658733 has 4 divisors (see below), whose sum is σ = 51355303797468. Its totient is φ = 51355271520000.

The previous prime is 51355287658643. The next prime is 51355287658769. The reversal of 51355287658733 is 33785678255315.

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 10322064563209 + 41033223095524 = 3212797^2 + 6405718^2 .

It is a cyclic number.

It is not a de Polignac number, because 51355287658733 - 2¹² = 51355287654637 is a prime.

It is a super-2 number, since 2×51355287658733² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51355287658793) 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, 1529366 + ... + 10249367.

It is an arithmetic number, because the mean of its divisors is an integer number (12838825949367).

Almost surely, 2^{51355287658733} is an apocalyptic number.

It is an amenable number.

51355287658733 is a deficient number, since it is larger than the sum of its proper divisors (16138735).

51355287658733 is a wasteful number, since it uses less digits than its factorization.

51355287658733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16138734.

The product of its digits is 635040000, while the sum is 68.

The spelling of 51355287658733 in words is "fifty-one trillion, three hundred fifty-five billion, two hundred eighty-seven million, six hundred fifty-eight thousand, seven hundred thirty-three".