81037650852 has 96 divisors (see below), whose sum is σ = 219401199360. Its totient is φ = 25818186240.

The previous prime is 81037650847. The next prime is 81037650877. The reversal of 81037650852 is 25805673018.

It is a super-2 number, since 2×81037650852² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81037650798 and 81037650807.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 3398652 + ... + 3422412.

It is an arithmetic number, because the mean of its divisors is an integer number (2285429160).

Almost surely, 2^81037650852 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81037650852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109700599680).

81037650852 is an abundant number, since it is smaller than the sum of its proper divisors (138363548508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81037650852 is a wasteful number, since it uses less digits than its factorization.

81037650852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25170 (or 25162 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 81037650852 in words is "eighty-one billion, thirty-seven million, six hundred fifty thousand, eight hundred fifty-two".