689690073138 has 64 divisors (see below), whose sum is σ = 1513067212800. Its totient is φ = 207846777600.

The previous prime is 689690073103. The next prime is 689690073143. The reversal of 689690073138 is 831370096986.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30025978 + ... + 30048938.

It is an arithmetic number, because the mean of its divisors is an integer number (23641675200).

Almost surely, 2^689690073138 is an apocalyptic number.

689690073138 is an abundant number, since it is smaller than the sum of its proper divisors (823377139662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

689690073138 is a wasteful number, since it uses less digits than its factorization.

689690073138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25463.

The product of its (nonzero) digits is 11757312, while the sum is 60.

The spelling of 689690073138 in words is "six hundred eighty-nine billion, six hundred ninety million, seventy-three thousand, one hundred thirty-eight".