81883564903790 has 16 divisors (see below), whose sum is σ = 158728141198368. Its totient is φ = 30233931656736.

The previous prime is 81883564903741. The next prime is 81883564903801. The reversal of 81883564903790 is 9730946538818.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314936787962 + ... + 314936788221.

It is an arithmetic number, because the mean of its divisors is an integer number (9920508824898).

Almost surely, 2^{81883564903790} is an apocalyptic number.

81883564903790 is a deficient number, since it is larger than the sum of its proper divisors (76844576294578).

81883564903790 is a wasteful number, since it uses less digits than its factorization.

81883564903790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629873576203.

The product of its (nonzero) digits is 313528320, while the sum is 71.

The spelling of 81883564903790 in words is "eighty-one trillion, eight hundred eighty-three billion, five hundred sixty-four million, nine hundred three thousand, seven hundred ninety".