97892642885 has 8 divisors (see below), whose sum is σ = 120646068216. Its totient is φ = 76197516480.

The previous prime is 97892642879. The next prime is 97892642909. The reversal of 97892642885 is 58824629879.

It is a Cunningham number, because it is equal to 312878²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 35241051076 + 62651591809 = 187726^2 + 250303^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-97892642885 is a prime.

It is a super-2 number, since 2×97892642885² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

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, 264574526 + ... + 264574895.

It is an arithmetic number, because the mean of its divisors is an integer number (15080758527).

Almost surely, 2^97892642885 is an apocalyptic number.

It is an amenable number.

97892642885 is a deficient number, since it is larger than the sum of its proper divisors (22753425331).

97892642885 is a wasteful number, since it uses less digits than its factorization.

97892642885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529149463.

The product of its digits is 139345920, while the sum is 68.

The spelling of 97892642885 in words is "ninety-seven billion, eight hundred ninety-two million, six hundred forty-two thousand, eight hundred eighty-five".