681400741409 has 8 divisors (see below), whose sum is σ = 683463337440. Its totient is φ = 679338386496.

The previous prime is 681400741397. The next prime is 681400741429. The reversal of 681400741409 is 904147004186.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 681400741409 - 2¹² = 681400737313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 681400741409.

It is not an unprimeable number, because it can be changed into a prime (681400741429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6763802 + ... + 6863804.

It is an arithmetic number, because the mean of its divisors is an integer number (85432917180).

Almost surely, 2^681400741409 is an apocalyptic number.

It is an amenable number.

681400741409 is a deficient number, since it is larger than the sum of its proper divisors (2062596031).

681400741409 is a wasteful number, since it uses less digits than its factorization.

681400741409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120559.

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 681400741409 in words is "six hundred eighty-one billion, four hundred million, seven hundred forty-one thousand, four hundred nine".