81336251050 has 12 divisors (see below), whose sum is σ = 151285427046. Its totient is φ = 32534500400.

The previous prime is 81336251027. The next prime is 81336251057. The reversal of 81336251050 is 5015263318.

It can be written as a sum of positive squares in 3 ways, for example, as 62471503249 + 18864747801 = 249943^2 + 137349^2 .

It is a super-2 number, since 2×81336251050² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81336250997 and 81336251015.

It is not an unprimeable number, because it can be changed into a prime (81336251057) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 813362461 + ... + 813362560.

Almost surely, 2^81336251050 is an apocalyptic number.

81336251050 is a deficient number, since it is larger than the sum of its proper divisors (69949175996).

81336251050 is a wasteful number, since it uses less digits than its factorization.

81336251050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626725033 (or 1626725028 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 81336251050 in words is "eighty-one billion, three hundred thirty-six million, two hundred fifty-one thousand, fifty".