681652171201 has 4 divisors (see below), whose sum is σ = 691826084272. Its totient is φ = 671478258132.

The previous prime is 681652171199. The next prime is 681652171219. The reversal of 681652171201 is 102171256186.

681652171201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 681652171201 - 2¹ = 681652171199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681652171301) 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, 5086956435 + ... + 5086956568.

It is an arithmetic number, because the mean of its divisors is an integer number (172956521068).

Almost surely, 2^681652171201 is an apocalyptic number.

It is an amenable number.

681652171201 is a deficient number, since it is larger than the sum of its proper divisors (10173913071).

681652171201 is a wasteful number, since it uses less digits than its factorization.

681652171201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10173913070.

The product of its (nonzero) digits is 40320, while the sum is 40.

The spelling of 681652171201 in words is "six hundred eighty-one billion, six hundred fifty-two million, one hundred seventy-one thousand, two hundred one".