681466152508 has 48 divisors (see below), whose sum is σ = 1207317756960. Its totient is φ = 336541169664.

The previous prime is 681466152487. The next prime is 681466152517. The reversal of 681466152508 is 805251664186.

It is a super-2 number, since 2×681466152508² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 352542310 + ... + 352544242.

It is an arithmetic number, because the mean of its divisors is an integer number (25152453270).

Almost surely, 2^681466152508 is an apocalyptic number.

It is an amenable number.

681466152508 is a deficient number, since it is larger than the sum of its proper divisors (525851604452).

681466152508 is a wasteful number, since it uses less digits than its factorization.

681466152508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4366 (or 4364 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 52.

The spelling of 681466152508 in words is "six hundred eighty-one billion, four hundred sixty-six million, one hundred fifty-two thousand, five hundred eight".