81064162648 has 32 divisors (see below), whose sum is σ = 173719303200. Its totient is φ = 34739707392.

The previous prime is 81064162633. The next prime is 81064162651. The reversal of 81064162648 is 84626146018.

It is a junction number, because it is equal to n+sod(n) for n = 81064162598 and 81064162607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1237536 + ... + 1301392.

It is an arithmetic number, because the mean of its divisors is an integer number (5428728225).

Almost surely, 2^81064162648 is an apocalyptic number.

It is an amenable number.

81064162648 is an abundant number, since it is smaller than the sum of its proper divisors (92655140552).

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

81064162648 is a wasteful number, since it uses less digits than its factorization.

81064162648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86539 (or 86535 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 46.

The spelling of 81064162648 in words is "eighty-one billion, sixty-four million, one hundred sixty-two thousand, six hundred forty-eight".