681629478835 has 8 divisors (see below), whose sum is σ = 836977592880. Its totient is φ = 532622104224.

The previous prime is 681629478779. The next prime is 681629478899. The reversal of 681629478835 is 538874926186.

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 681629478835 - 2¹⁵ = 681629446067 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1585184620 + ... + 1585185049.

It is an arithmetic number, because the mean of its divisors is an integer number (104622199110).

Almost surely, 2^681629478835 is an apocalyptic number.

681629478835 is a deficient number, since it is larger than the sum of its proper divisors (155348114045).

681629478835 is a wasteful number, since it uses less digits than its factorization.

681629478835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3170369717.

The product of its digits is 139345920, while the sum is 67.

The spelling of 681629478835 in words is "six hundred eighty-one billion, six hundred twenty-nine million, four hundred seventy-eight thousand, eight hundred thirty-five".