83894437657982 has 16 divisors (see below), whose sum is σ = 144392020198272. Its totient is φ = 35811512943000.

The previous prime is 83894437657981. The next prime is 83894437657999. The reversal of 83894437657982 is 28975673449838.

It is a self number, because there is not a number n which added to its sum of digits gives 83894437657982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83894437657981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11937167468 + ... + 11937174495.

It is an arithmetic number, because the mean of its divisors is an integer number (9024501262392).

Almost surely, 2^{83894437657982} is an apocalyptic number.

83894437657982 is a deficient number, since it is larger than the sum of its proper divisors (60497582540290).

83894437657982 is a wasteful number, since it uses less digits than its factorization.

83894437657982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23874342223.

The product of its digits is 17557585920, while the sum is 83.

The spelling of 83894437657982 in words is "eighty-three trillion, eight hundred ninety-four billion, four hundred thirty-seven million, six hundred fifty-seven thousand, nine hundred eighty-two".