81313344710 has 32 divisors (see below), whose sum is σ = 161467260192. Its totient is φ = 29291109120.

The previous prime is 81313344677. The next prime is 81313344727. The reversal of 81313344710 is 1744331318.

It is a super-3 number, since 3×81313344710³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7622564 + ... + 7633223.

It is an arithmetic number, because the mean of its divisors is an integer number (5045851881).

Almost surely, 2^81313344710 is an apocalyptic number.

81313344710 is a deficient number, since it is larger than the sum of its proper divisors (80153915482).

81313344710 is a wasteful number, since it uses less digits than its factorization.

81313344710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15255848.

The product of its (nonzero) digits is 24192, while the sum is 35.

The spelling of 81313344710 in words is "eighty-one billion, three hundred thirteen million, three hundred forty-four thousand, seven hundred ten".