81141164910 has 64 divisors (see below), whose sum is σ = 233020791360. Its totient is φ = 19973208960.

The previous prime is 81141164903. The next prime is 81141164927. The reversal of 81141164910 is 1946114118.

81141164910 is a `hidden beast` number, since 8 + 1 + 1 + 4 + 1 + 1 + 649 + 1 + 0 = 666.

It is a Curzon number.

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, 11555061 + ... + 11562080.

It is an arithmetic number, because the mean of its divisors is an integer number (3640949865).

Almost surely, 2^81141164910 is an apocalyptic number.

81141164910 is an abundant number, since it is smaller than the sum of its proper divisors (151879626450).

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

81141164910 is a wasteful number, since it uses less digits than its factorization.

81141164910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23117170 (or 23117164 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

It can be divided in two parts, 81141 and 164910, that added together give a triangular number (246051 = T₇₀₁).

The spelling of 81141164910 in words is "eighty-one billion, one hundred forty-one million, one hundred sixty-four thousand, nine hundred ten".