81081007662 has 32 divisors (see below), whose sum is σ = 164026404000. Its totient is φ = 26716428288.

The previous prime is 81081007661. The next prime is 81081007691. The reversal of 81081007662 is 26670018018.

It is a self number, because there is not a number n which added to its sum of digits gives 81081007662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81081007661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2309214 + ... + 2344062.

It is an arithmetic number, because the mean of its divisors is an integer number (5125825125).

Almost surely, 2^81081007662 is an apocalyptic number.

81081007662 is an abundant number, since it is smaller than the sum of its proper divisors (82945396338).

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

81081007662 is a wasteful number, since it uses less digits than its factorization.

81081007662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39300.

The product of its (nonzero) digits is 32256, while the sum is 39.

The spelling of 81081007662 in words is "eighty-one billion, eighty-one million, seven thousand, six hundred sixty-two".