81379503324 has 36 divisors (see below), whose sum is σ = 235096343664. Its totient is φ = 23251286592.

The previous prime is 81379503299. The next prime is 81379503347. The reversal of 81379503324 is 42330597318.

81379503324 is a `hidden beast` number, since 8 + 137 + 9 + 503 + 3 + 2 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×81379503324² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81379503324.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161467017 + ... + 161467520.

Almost surely, 2^81379503324 is an apocalyptic number.

81379503324 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

81379503324 is an abundant number, since it is smaller than the sum of its proper divisors (153716840340).

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

81379503324 is a wasteful number, since it uses less digits than its factorization.

81379503324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322934554 (or 322934549 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 81379503324 in words is "eighty-one billion, three hundred seventy-nine million, five hundred three thousand, three hundred twenty-four".