81848610715620 has 192 divisors, whose sum is σ = 276116880162816. Its totient is φ = 17719553986560.

The previous prime is 81848610715567. The next prime is 81848610715657. The reversal of 81848610715620 is 2651701684818.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 66264397 + ... + 67488276.

It is an arithmetic number, because the mean of its divisors is an integer number (1438108750848).

Almost surely, 2^{81848610715620} is an apocalyptic number.

It is an amenable number.

81848610715620 is an abundant number, since it is smaller than the sum of its proper divisors (194268269447196).

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

81848610715620 is a wasteful number, since it uses less digits than its factorization.

81848610715620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133752770 (or 133752768 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 57.

The spelling of 81848610715620 in words is "eighty-one trillion, eight hundred forty-eight billion, six hundred ten million, seven hundred fifteen thousand, six hundred twenty".