81746482016 has 24 divisors (see below), whose sum is σ = 161287522704. Its totient is φ = 40784571520.

The previous prime is 81746481977. The next prime is 81746482067. The reversal of 81746482016 is 61028464718.

It is a super-2 number, since 2×81746482016² (a number of 23 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, 2755940 + ... + 2785443.

It is an arithmetic number, because the mean of its divisors is an integer number (6720313446).

Almost surely, 2^81746482016 is an apocalyptic number.

It is an amenable number.

81746482016 is a deficient number, since it is larger than the sum of its proper divisors (79541040688).

81746482016 is a wasteful number, since it uses less digits than its factorization.

81746482016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5541854 (or 5541846 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 47.

The spelling of 81746482016 in words is "eighty-one billion, seven hundred forty-six million, four hundred eighty-two thousand, sixteen".