81834740371 has 16 divisors (see below), whose sum is σ = 86656284000. Its totient is φ = 77147820288.

The previous prime is 81834740363. The next prime is 81834740387. The reversal of 81834740371 is 17304743818.

It is a cyclic number.

It is not a de Polignac number, because 81834740371 - 2³ = 81834740363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81834740311) 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, 4051405 + ... + 4071553.

It is an arithmetic number, because the mean of its divisors is an integer number (5416017750).

Almost surely, 2^81834740371 is an apocalyptic number.

81834740371 is a deficient number, since it is larger than the sum of its proper divisors (4821543629).

81834740371 is a wasteful number, since it uses less digits than its factorization.

81834740371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23478.

The product of its (nonzero) digits is 451584, while the sum is 46.

The spelling of 81834740371 in words is "eighty-one billion, eight hundred thirty-four million, seven hundred forty thousand, three hundred seventy-one".