51102326749 has 4 divisors (see below), whose sum is σ = 51203922336. Its totient is φ = 51000731164.

The previous prime is 51102326747. The next prime is 51102326809. The reversal of 51102326749 is 94762320115.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51102326749 - 2¹ = 51102326747 is a prime.

It is a super-2 number, since 2×51102326749² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51102326747) 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, 50797039 + ... + 50798044.

It is an arithmetic number, because the mean of its divisors is an integer number (12800980584).

Almost surely, 2^51102326749 is an apocalyptic number.

It is an amenable number.

51102326749 is a deficient number, since it is larger than the sum of its proper divisors (101595587).

51102326749 is a wasteful number, since it uses less digits than its factorization.

51102326749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101595586.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 51102326749 in words is "fifty-one billion, one hundred two million, three hundred twenty-six thousand, seven hundred forty-nine".