681544496810 has 32 divisors (see below), whose sum is σ = 1292151623040. Its totient is φ = 258108662592.

The previous prime is 681544496761. The next prime is 681544496833. The reversal of 681544496810 is 18694445186.

It is a happy number.

It is a super-2 number, since 2×681544496810² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 810749 + ... + 1421408.

It is an arithmetic number, because the mean of its divisors is an integer number (40379738220).

Almost surely, 2^681544496810 is an apocalyptic number.

681544496810 is a deficient number, since it is larger than the sum of its proper divisors (610607126230).

681544496810 is a wasteful number, since it uses less digits than its factorization.

681544496810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233790.

The product of its (nonzero) digits is 6635520, while the sum is 56.

The spelling of 681544496810 in words is "six hundred eighty-one billion, five hundred forty-four million, four hundred ninety-six thousand, eight hundred ten".