81700822137532 has 48 divisors (see below), whose sum is σ = 154441726729920. Its totient is φ = 37593731814912.

The previous prime is 81700822137413. The next prime is 81700822137547. The reversal of 81700822137532 is 23573122800718.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75196698 + ... + 76275454.

It is an arithmetic number, because the mean of its divisors is an integer number (3217535973540).

Almost surely, 2^{81700822137532} is an apocalyptic number.

It is an amenable number.

81700822137532 is a deficient number, since it is larger than the sum of its proper divisors (72740904592388).

81700822137532 is a wasteful number, since it uses less digits than its factorization.

81700822137532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083190 (or 1083188 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 81700822137532 in words is "eighty-one trillion, seven hundred billion, eight hundred twenty-two million, one hundred thirty-seven thousand, five hundred thirty-two".