50091331815529 has 9 divisors (see below), whose sum is σ = 50288824212727. Its totient is φ = 49894612063744.

The previous prime is 50091331815509. The next prime is 50091331815541. The reversal of 50091331815529 is 92551813319005.

It is a happy number.

The square root of 50091331815529 is 7077523.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 49314733778025 + 776598037504 = 7022445^2 + 881248^2 .

It is not a de Polignac number, because 50091331815529 - 2⁹ = 50091331815017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50091331815509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1818909642 + ... + 1818937180.

Almost surely, 2^{50091331815529} is an apocalyptic number.

50091331815529 is the 7077523-rd square number.

50091331815529 is the 3538762-nd centered octagonal number.

It is an amenable number.

50091331815529 is a deficient number, since it is larger than the sum of its proper divisors (197492397198).

50091331815529 is an frugal number, since it uses more digits than its factorization.

50091331815529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55592 (or 27796 counting only the distinct ones).

The product of its (nonzero) digits is 1458000, while the sum is 52.

The spelling of 50091331815529 in words is "fifty trillion, ninety-one billion, three hundred thirty-one million, eight hundred fifteen thousand, five hundred twenty-nine".