81503308364 has 12 divisors (see below), whose sum is σ = 142633482600. Its totient is φ = 40750884768.

The previous prime is 81503308357. The next prime is 81503308417. The reversal of 81503308364 is 46380330518.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93032 + ... + 414320.

It is an arithmetic number, because the mean of its divisors is an integer number (11886123550).

Almost surely, 2^81503308364 is an apocalyptic number.

It is an amenable number.

81503308364 is a deficient number, since it is larger than the sum of its proper divisors (61130174236).

81503308364 is a wasteful number, since it uses less digits than its factorization.

81503308364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384712 (or 384710 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 81503308364 in words is "eighty-one billion, five hundred three million, three hundred eight thousand, three hundred sixty-four".