84534438097989 has 12 divisors (see below), whose sum is σ = 133205781245472. Its totient is φ = 51232992786600.

The previous prime is 84534438097927. The next prime is 84534438098063. The reversal of 84534438097989 is 98979083443548.

84534438097989 is a `hidden beast` number, since 8 + 4 + 5 + 3 + 4 + 438 + 0 + 97 + 98 + 9 = 666.

It is not a de Polignac number, because 84534438097989 - 2²⁹ = 84533901227077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84534438097589) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 426941606457 + ... + 426941606654.

It is an arithmetic number, because the mean of its divisors is an integer number (11100481770456).

Almost surely, 2^{84534438097989} is an apocalyptic number.

It is an amenable number.

84534438097989 is a deficient number, since it is larger than the sum of its proper divisors (48671343147483).

84534438097989 is a wasteful number, since it uses less digits than its factorization.

84534438097989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853883213128 (or 853883213125 counting only the distinct ones).

The product of its (nonzero) digits is 7524679680, while the sum is 81.

The spelling of 84534438097989 in words is "eighty-four trillion, five hundred thirty-four billion, four hundred thirty-eight million, ninety-seven thousand, nine hundred eighty-nine".