681519730236 has 24 divisors (see below), whose sum is σ = 1627194395904. Its totient is φ = 221890144560.

The previous prime is 681519730187. The next prime is 681519730267. The reversal of 681519730236 is 632037915186.

It is a super-3 number, since 3×681519730236³ (a number of 36 digits) contains 333 as substring.

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, 660386820 + ... + 660387851.

It is an arithmetic number, because the mean of its divisors is an integer number (67799766496).

Almost surely, 2^681519730236 is an apocalyptic number.

It is an amenable number.

681519730236 is an abundant number, since it is smaller than the sum of its proper divisors (945674665668).

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

681519730236 is a wasteful number, since it uses less digits than its factorization.

681519730236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320774721 (or 1320774719 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 51.

The spelling of 681519730236 in words is "six hundred eighty-one billion, five hundred nineteen million, seven hundred thirty thousand, two hundred thirty-six".