81037517234 has 32 divisors (see below), whose sum is σ = 133730956800. Its totient is φ = 36680394240.

The previous prime is 81037517213. The next prime is 81037517257. The reversal of 81037517234 is 43271573018.

It is a junction number, because it is equal to n+sod(n) for n = 81037517191 and 81037517200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272162 + ... + 485949.

It is an arithmetic number, because the mean of its divisors is an integer number (4179092400).

Almost surely, 2^81037517234 is an apocalyptic number.

81037517234 is a deficient number, since it is larger than the sum of its proper divisors (52693439566).

81037517234 is a wasteful number, since it uses less digits than its factorization.

81037517234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758258.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 81037517234 in words is "eighty-one billion, thirty-seven million, five hundred seventeen thousand, two hundred thirty-four".