681073505 has 16 divisors (see below), whose sum is σ = 934829184. Its totient is φ = 466629120.

The previous prime is 681073501. The next prime is 681073513. The reversal of 681073505 is 505370186.

It is not a de Polignac number, because 681073505 - 2² = 681073501 is a prime.

It is a super-2 number, since 2×681073505² = 927722238425970050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681073501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37649 + ... + 52721.

It is an arithmetic number, because the mean of its divisors is an integer number (58426824).

Almost surely, 2^681073505 is an apocalyptic number.

It is an amenable number.

681073505 is a deficient number, since it is larger than the sum of its proper divisors (253755679).

681073505 is a wasteful number, since it uses less digits than its factorization.

681073505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16376.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 681073505 is about 26097.3850222585. The cubic root of 681073505 is about 879.8284380598.

The spelling of 681073505 in words is "six hundred eighty-one million, seventy-three thousand, five hundred five".