81133300722 has 32 divisors (see below), whose sum is σ = 169340341248. Its totient is φ = 25865736336.

The previous prime is 81133300687. The next prime is 81133300739. The reversal of 81133300722 is 22700333118.

It is a super-2 number, since 2×81133300722² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81133300722.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1477653 + ... + 1531575.

It is an arithmetic number, because the mean of its divisors is an integer number (5291885664).

Almost surely, 2^81133300722 is an apocalyptic number.

81133300722 is an abundant number, since it is smaller than the sum of its proper divisors (88207040526).

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

81133300722 is a wasteful number, since it uses less digits than its factorization.

81133300722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64854.

The product of its (nonzero) digits is 6048, while the sum is 30.

The spelling of 81133300722 in words is "eighty-one billion, one hundred thirty-three million, three hundred thousand, seven hundred twenty-two".