96781009081 has 4 divisors (see below), whose sum is σ = 96782211072. Its totient is φ = 96779807092.

The previous prime is 96781009079. The next prime is 96781009153. The reversal of 96781009081 is 18090018769.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 96781009081 - 2¹ = 96781009079 is a prime.

It is a super-2 number, since 2×96781009081² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (96781000081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470821 + ... + 644386.

It is an arithmetic number, because the mean of its divisors is an integer number (24195552768).

Almost surely, 2^96781009081 is an apocalyptic number.

It is an amenable number.

96781009081 is a deficient number, since it is larger than the sum of its proper divisors (1201991).

96781009081 is a wasteful number, since it uses less digits than its factorization.

96781009081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201990.

The product of its (nonzero) digits is 217728, while the sum is 49.

The spelling of 96781009081 in words is "ninety-six billion, seven hundred eighty-one million, nine thousand, eighty-one".