81895080652 has 24 divisors (see below), whose sum is σ = 178680176640. Its totient is φ = 31907174160.

The previous prime is 81895080649. The next prime is 81895080667. The reversal of 81895080652 is 25608059818.

It is a self number, because there is not a number n which added to its sum of digits gives 81895080652.

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, 132946252 + ... + 132946867.

It is an arithmetic number, because the mean of its divisors is an integer number (7445007360).

Almost surely, 2^81895080652 is an apocalyptic number.

It is an amenable number.

81895080652 is an abundant number, since it is smaller than the sum of its proper divisors (96785095988).

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

81895080652 is a wasteful number, since it uses less digits than its factorization.

81895080652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265893141 (or 265893139 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 52.

The spelling of 81895080652 in words is "eighty-one billion, eight hundred ninety-five million, eighty thousand, six hundred fifty-two".