81034048766 has 64 divisors (see below), whose sum is σ = 137038936320. Its totient is φ = 35619816960.

The previous prime is 81034048729. The next prime is 81034048783. The reversal of 81034048766 is 66784043018.

It is a happy number.

It is a super-2 number, since 2×81034048766² (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 81034048766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50051105 + ... + 50052723.

It is an arithmetic number, because the mean of its divisors is an integer number (2141233380).

Almost surely, 2^81034048766 is an apocalyptic number.

81034048766 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

81034048766 is a deficient number, since it is larger than the sum of its proper divisors (56004887554).

81034048766 is a wasteful number, since it uses less digits than its factorization.

81034048766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 81034048766 in words is "eighty-one billion, thirty-four million, forty-eight thousand, seven hundred sixty-six".