681326595 has 48 divisors (see below), whose sum is σ = 1264610880. Its totient is φ = 338122752.

The previous prime is 681326509. The next prime is 681326603. The reversal of 681326595 is 595623186.

It is not a de Polignac number, because 681326595 - 2⁷ = 681326467 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 681326595.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 63082 + ... + 73088.

It is an arithmetic number, because the mean of its divisors is an integer number (26346060).

Almost surely, 2^681326595 is an apocalyptic number.

681326595 is a deficient number, since it is larger than the sum of its proper divisors (583284285).

681326595 is a wasteful number, since it uses less digits than its factorization.

681326595 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10124 (or 10121 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 681326595 is about 26102.2335251219. The cubic root of 681326595 is about 879.9374073077.

The spelling of 681326595 in words is "six hundred eighty-one million, three hundred twenty-six thousand, five hundred ninety-five".