81062711352 has 144 divisors (see below), whose sum is σ = 255883038840. Its totient is φ = 23115964032.

The previous prime is 81062711299. The next prime is 81062711357. The reversal of 81062711352 is 25311726018.

81062711352 is a `hidden beast` number, since 8 + 10 + 627 + 1 + 13 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81062711357) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1823178 + ... + 1867110.

Almost surely, 2^81062711352 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 81062711352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127941519420).

81062711352 is an abundant number, since it is smaller than the sum of its proper divisors (174820327488).

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

81062711352 is a wasteful number, since it uses less digits than its factorization.

81062711352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44482 (or 44468 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 81062711352 in words is "eighty-one billion, sixty-two million, seven hundred eleven thousand, three hundred fifty-two".