679289543520 has 384 divisors, whose sum is σ = 2571977318400. Its totient is φ = 147421347840.

The previous prime is 679289543507. The next prime is 679289543533. The reversal of 679289543520 is 25345982976.

It is an interprime number because it is at equal distance from previous prime (679289543507) and next prime (679289543533).

It is a super-2 number, since 2×679289543520² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5458956 + ... + 5582004.

It is an arithmetic number, because the mean of its divisors is an integer number (6697857600).

Almost surely, 2^679289543520 is an apocalyptic number.

679289543520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 679289543520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1285988659200).

679289543520 is an abundant number, since it is smaller than the sum of its proper divisors (1892687774880).

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

679289543520 is a wasteful number, since it uses less digits than its factorization.

679289543520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123158 (or 123150 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 60.

The spelling of 679289543520 in words is "six hundred seventy-nine billion, two hundred eighty-nine million, five hundred forty-three thousand, five hundred twenty".