81616051202716 has 12 divisors (see below), whose sum is σ = 142844998399488. Its totient is φ = 40803194517152.

The previous prime is 81616051202687. The next prime is 81616051202729. The reversal of 81616051202716 is 61720215061618.

It is a super-2 number, since 2×81616051202716² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1207733041 + ... + 1207800616.

It is an arithmetic number, because the mean of its divisors is an integer number (11903749866624).

Almost surely, 2^{81616051202716} is an apocalyptic number.

It is an amenable number.

81616051202716 is a deficient number, since it is larger than the sum of its proper divisors (61228947196772).

81616051202716 is a wasteful number, since it uses less digits than its factorization.

81616051202716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2415542108 (or 2415542106 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 81616051202716 in words is "eighty-one trillion, six hundred sixteen billion, fifty-one million, two hundred two thousand, seven hundred sixteen".