680895235944 has 384 divisors, whose sum is σ = 2388156825600. Its totient is φ = 176568387840.

The previous prime is 680895235931. The next prime is 680895235987. The reversal of 680895235944 is 449532598086.

680895235944 is a `hidden beast` number, since 68 + 0 + 8 + 9 + 523 + 5 + 9 + 44 = 666.

It is a super-2 number, since 2×680895235944² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 95 ways as a sum of consecutive naturals, for example, 101335417 + ... + 101342135.

It is an arithmetic number, because the mean of its divisors is an integer number (6219158400).

Almost surely, 2^680895235944 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 680895235944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1194078412800).

680895235944 is an abundant number, since it is smaller than the sum of its proper divisors (1707261589656).

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

680895235944 is a wasteful number, since it uses less digits than its factorization.

680895235944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7435 (or 7419 counting only the distinct ones).

The product of its (nonzero) digits is 74649600, while the sum is 63.

The spelling of 680895235944 in words is "six hundred eighty billion, eight hundred ninety-five million, two hundred thirty-five thousand, nine hundred forty-four".