81027652537216 has 192 divisors, whose sum is σ = 211455555816960. Its totient is φ = 30550852684800.

The previous prime is 81027652537211. The next prime is 81027652537219. The reversal of 81027652537216 is 61273525672018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81027652537211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16803990 + ... + 21081493.

It is an arithmetic number, because the mean of its divisors is an integer number (1101331019880).

Almost surely, 2^{81027652537216} is an apocalyptic number.

It is an amenable number.

81027652537216 is an abundant number, since it is smaller than the sum of its proper divisors (130427903279744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81027652537216 is a wasteful number, since it uses less digits than its factorization.

81027652537216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37885553 (or 37885534 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 55.

The spelling of 81027652537216 in words is "eighty-one trillion, twenty-seven billion, six hundred fifty-two million, five hundred thirty-seven thousand, two hundred sixteen".