681205432920 has 32 divisors (see below), whose sum is σ = 2043616299120. Its totient is φ = 181654782080.

The previous prime is 681205432913. The next prime is 681205432931. The reversal of 681205432920 is 29234502186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2838355851 + ... + 2838356090.

Almost surely, 2^681205432920 is an apocalyptic number.

681205432920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

681205432920 is an abundant number, since it is smaller than the sum of its proper divisors (1362410866200).

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

681205432920 is a wasteful number, since it uses less digits than its factorization.

681205432920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5676711955 (or 5676711951 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 681205432920 in words is "six hundred eighty-one billion, two hundred five million, four hundred thirty-two thousand, nine hundred twenty".