681260565401 has 16 divisors (see below), whose sum is σ = 767998522368. Its totient is φ = 599998795200.

The previous prime is 681260565371. The next prime is 681260565437. The reversal of 681260565401 is 104565062186.

It is a cyclic number.

It is not a de Polignac number, because 681260565401 - 2²² = 681256371097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681260555401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11876126 + ... + 11933351.

It is an arithmetic number, because the mean of its divisors is an integer number (47999907648).

Almost surely, 2^681260565401 is an apocalyptic number.

It is an amenable number.

681260565401 is a deficient number, since it is larger than the sum of its proper divisors (86737956967).

681260565401 is a wasteful number, since it uses less digits than its factorization.

681260565401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23809592.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 681260565401 in words is "six hundred eighty-one billion, two hundred sixty million, five hundred sixty-five thousand, four hundred one".