681019862136 has 64 divisors (see below), whose sum is σ = 1724289600000. Its totient is φ = 224108591616.

The previous prime is 681019862123. The next prime is 681019862183. The reversal of 681019862136 is 631268910186.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27382875 + ... + 27407733.

It is an arithmetic number, because the mean of its divisors is an integer number (26942025000).

Almost surely, 2^681019862136 is an apocalyptic number.

It is an amenable number.

681019862136 is an abundant number, since it is smaller than the sum of its proper divisors (1043269737864).

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

681019862136 is a wasteful number, since it uses less digits than its factorization.

681019862136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39396 (or 39392 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 51.

The spelling of 681019862136 in words is "six hundred eighty-one billion, nineteen million, eight hundred sixty-two thousand, one hundred thirty-six".