81450792860 has 48 divisors (see below), whose sum is σ = 183307392576. Its totient is φ = 30321510912.

The previous prime is 81450792833. The next prime is 81450792869. The reversal of 81450792860 is 6829705418.

It is a junction number, because it is equal to n+sod(n) for n = 81450792799 and 81450792808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81450792869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2375777 + ... + 2409816.

It is an arithmetic number, because the mean of its divisors is an integer number (3818904012).

Almost surely, 2^81450792860 is an apocalyptic number.

It is an amenable number.

81450792860 is an abundant number, since it is smaller than the sum of its proper divisors (101856599716).

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

81450792860 is a wasteful number, since it uses less digits than its factorization.

81450792860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4785662 (or 4785660 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 81450792860 in words is "eighty-one billion, four hundred fifty million, seven hundred ninety-two thousand, eight hundred sixty".