81360763502 has 4 divisors (see below), whose sum is σ = 122041145256. Its totient is φ = 40680381750.

The previous prime is 81360763483. The next prime is 81360763513. The reversal of 81360763502 is 20536706318.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 81360763502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20340190874 + ... + 20340190877.

It is an arithmetic number, because the mean of its divisors is an integer number (30510286314).

Almost surely, 2^81360763502 is an apocalyptic number.

81360763502 is a deficient number, since it is larger than the sum of its proper divisors (40680381754).

81360763502 is a wasteful number, since it uses less digits than its factorization.

81360763502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40680381753.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 81360763502 in words is "eighty-one billion, three hundred sixty million, seven hundred sixty-three thousand, five hundred two".