698640543123 has 8 divisors (see below), whose sum is σ = 931542826128. Its totient is φ = 465749311104.

The previous prime is 698640543121. The next prime is 698640543143. The reversal of 698640543123 is 321345046896.

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

It is not a de Polignac number, because 698640543123 - 2¹ = 698640543121 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (698640543121) 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, 2614090 + ... + 2868927.

It is an arithmetic number, because the mean of its divisors is an integer number (116442853266).

Almost surely, 2^698640543123 is an apocalyptic number.

698640543123 is a deficient number, since it is larger than the sum of its proper divisors (232902283005).

698640543123 is a wasteful number, since it uses less digits than its factorization.

698640543123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5525493.

The product of its (nonzero) digits is 3732480, while the sum is 51.

The spelling of 698640543123 in words is "six hundred ninety-eight billion, six hundred forty million, five hundred forty-three thousand, one hundred twenty-three".