81737273820077 has 8 divisors (see below), whose sum is σ = 81769024056960. Its totient is φ = 81705524768560.

The previous prime is 81737273820071. The next prime is 81737273820089. The reversal of 81737273820077 is 77002837273718.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81737273820077 - 2²⁸ = 81737005384621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81737273820071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152956283 + ... + 153489735.

It is an arithmetic number, because the mean of its divisors is an integer number (10221128007120).

Almost surely, 2^{81737273820077} is an apocalyptic number.

It is an amenable number.

81737273820077 is a deficient number, since it is larger than the sum of its proper divisors (31750236883).

81737273820077 is a wasteful number, since it uses less digits than its factorization.

81737273820077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592683.

The product of its (nonzero) digits is 38723328, while the sum is 62.

The spelling of 81737273820077 in words is "eighty-one trillion, seven hundred thirty-seven billion, two hundred seventy-three million, eight hundred twenty thousand, seventy-seven".