97985528081 has 16 divisors (see below), whose sum is σ = 118596201984. Its totient is φ = 79030162944.

The previous prime is 97985528059. The next prime is 97985528087. The reversal of 97985528081 is 18082558979.

It is a cyclic number.

It is not a de Polignac number, because 97985528081 - 2²⁶ = 97918419217 is a prime.

It is a super-2 number, since 2×97985528081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97985528087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 483101 + ... + 655253.

It is an arithmetic number, because the mean of its divisors is an integer number (7412262624).

Almost surely, 2^97985528081 is an apocalyptic number.

It is an amenable number.

97985528081 is a deficient number, since it is larger than the sum of its proper divisors (20610673903).

97985528081 is a wasteful number, since it uses less digits than its factorization.

97985528081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176960.

The product of its (nonzero) digits is 14515200, while the sum is 62.

The spelling of 97985528081 in words is "ninety-seven billion, nine hundred eighty-five million, five hundred twenty-eight thousand, eighty-one".