81360485364 has 48 divisors (see below), whose sum is σ = 192106643456. Its totient is φ = 26798428800.

The previous prime is 81360485363. The next prime is 81360485411. The reversal of 81360485364 is 46358406318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81360485363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221709 + ... + 460299.

Almost surely, 2^81360485364 is an apocalyptic number.

It is an amenable number.

81360485364 is an abundant number, since it is smaller than the sum of its proper divisors (110746158092).

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

81360485364 is a wasteful number, since it uses less digits than its factorization.

81360485364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238936 (or 238934 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 48.

The spelling of 81360485364 in words is "eighty-one billion, three hundred sixty million, four hundred eighty-five thousand, three hundred sixty-four".