81315452930952 has 16 divisors (see below), whose sum is σ = 203288632327440. Its totient is φ = 27105150976976.

The previous prime is 81315452930951. The next prime is 81315452930983. The reversal of 81315452930952 is 25903925451318.

It is a super-2 number, since 2×81315452930952² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81315452930892 and 81315452930901.

It is not an unprimeable number, because it can be changed into a prime (81315452930951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1694071936038 + ... + 1694071936085.

It is an arithmetic number, because the mean of its divisors is an integer number (12705539520465).

Almost surely, 2^{81315452930952} is an apocalyptic number.

It is an amenable number.

81315452930952 is an abundant number, since it is smaller than the sum of its proper divisors (121973179396488).

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

81315452930952 is a wasteful number, since it uses less digits than its factorization.

81315452930952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3388143872132 (or 3388143872128 counting only the distinct ones).

The product of its (nonzero) digits is 11664000, while the sum is 57.

The spelling of 81315452930952 in words is "eighty-one trillion, three hundred fifteen billion, four hundred fifty-two million, nine hundred thirty thousand, nine hundred fifty-two".