680861554632 has 384 divisors, whose sum is σ = 2252505024000. Its totient is φ = 189915909120.

The previous prime is 680861554627. The next prime is 680861554699. The reversal of 680861554632 is 236455168086.

680861554632 is a `hidden beast` number, since 6 + 8 + 0 + 8 + 61 + 5 + 546 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 229322044 + ... + 229325012.

It is an arithmetic number, because the mean of its divisors is an integer number (5865898500).

Almost surely, 2^680861554632 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 680861554632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1126252512000).

680861554632 is an abundant number, since it is smaller than the sum of its proper divisors (1571643469368).

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

680861554632 is a wasteful number, since it uses less digits than its factorization.

680861554632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3506 (or 3489 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 54.

The spelling of 680861554632 in words is "six hundred eighty billion, eight hundred sixty-one million, five hundred fifty-four thousand, six hundred thirty-two".