681434737148 has 24 divisors (see below), whose sum is σ = 1302695713200. Its totient is φ = 309320478720.

The previous prime is 681434737133. The next prime is 681434737169. The reversal of 681434737148 is 841737434186.

It is a junction number, because it is equal to n+sod(n) for n = 681434737093 and 681434737102.

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 7 ways as a sum of consecutive naturals, for example, 10531973 + ... + 10596476.

It is an arithmetic number, because the mean of its divisors is an integer number (54278988050).

Almost surely, 2^681434737148 is an apocalyptic number.

It is an amenable number.

681434737148 is a deficient number, since it is larger than the sum of its proper divisors (621260976052).

681434737148 is a wasteful number, since it uses less digits than its factorization.

681434737148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21129197 (or 21129195 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 56.

The spelling of 681434737148 in words is "six hundred eighty-one billion, four hundred thirty-four million, seven hundred thirty-seven thousand, one hundred forty-eight".