97680663684181 has 4 divisors (see below), whose sum is σ = 97704776416864. Its totient is φ = 97656550951500.

The previous prime is 97680663684173. The next prime is 97680663684187. The reversal of 97680663684181 is 18148636608679.

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 97680663684181 - 2³ = 97680663684173 is a prime.

It is a super-2 number, since 2×97680663684181² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97680663684187) 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, 12056360265 + ... + 12056368366.

It is an arithmetic number, because the mean of its divisors is an integer number (24426194104216).

Almost surely, 2^{97680663684181} is an apocalyptic number.

It is an amenable number.

97680663684181 is a deficient number, since it is larger than the sum of its proper divisors (24112732683).

97680663684181 is a wasteful number, since it uses less digits than its factorization.

97680663684181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24112732682.

The product of its (nonzero) digits is 501645312, while the sum is 73.

The spelling of 97680663684181 in words is "ninety-seven trillion, six hundred eighty billion, six hundred sixty-three million, six hundred eighty-four thousand, one hundred eighty-one".