81041167774 has 32 divisors (see below), whose sum is σ = 142104851136. Its totient is φ = 33944901120.

The previous prime is 81041167771. The next prime is 81041167807. The reversal of 81041167774 is 47776114018.

It is a super-2 number, since 2×81041167774² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81041167771) 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, 168139 + ... + 436294.

It is an arithmetic number, because the mean of its divisors is an integer number (4440776598).

Almost surely, 2^81041167774 is an apocalyptic number.

81041167774 is a deficient number, since it is larger than the sum of its proper divisors (61063683362).

81041167774 is a wasteful number, since it uses less digits than its factorization.

81041167774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604660.

The product of its (nonzero) digits is 263424, while the sum is 46.

The spelling of 81041167774 in words is "eighty-one billion, forty-one million, one hundred sixty-seven thousand, seven hundred seventy-four".