679091616 has 144 divisors (see below), whose sum is σ = 2323339200. Its totient is φ = 183803904.

The previous prime is 679091587. The next prime is 679091617. The reversal of 679091616 is 616190976.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×679091616² = 922330845842982912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (679091617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29440 + ... + 47168.

It is an arithmetic number, because the mean of its divisors is an integer number (16134300).

Almost surely, 2^679091616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 679091616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1161669600).

679091616 is an abundant number, since it is smaller than the sum of its proper divisors (1644247584).

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

679091616 is a wasteful number, since it uses less digits than its factorization.

679091616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17771 (or 17760 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 679091616 is about 26059.3863319918. The cubic root of 679091616 is about 878.9741903607.

The spelling of 679091616 in words is "six hundred seventy-nine million, ninety-one thousand, six hundred sixteen".