91825131769 has 12 divisors (see below), whose sum is σ = 108568091748. Its totient is φ = 77416970400.

The previous prime is 91825131767. The next prime is 91825131799. The reversal of 91825131769 is 96713152819.

It can be written as a sum of positive squares in 2 ways, for example, as 28024434025 + 63800697744 = 167405^2 + 252588^2 .

It is not a de Polignac number, because 91825131769 - 2¹ = 91825131767 is a prime.

It is a super-2 number, since 2×91825131769² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91825131767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15357522 + ... + 15363499.

It is an arithmetic number, because the mean of its divisors is an integer number (9047340979).

Almost surely, 2^91825131769 is an apocalyptic number.

91825131769 is the 174953-rd hex number.

It is an amenable number.

91825131769 is a deficient number, since it is larger than the sum of its proper divisors (16742959979).

91825131769 is a wasteful number, since it uses less digits than its factorization.

91825131769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30721096 (or 30721089 counting only the distinct ones).

The product of its digits is 816480, while the sum is 52.

The spelling of 91825131769 in words is "ninety-one billion, eight hundred twenty-five million, one hundred thirty-one thousand, seven hundred sixty-nine".