681073630 has 16 divisors (see below), whose sum is σ = 1229576400. Its totient is φ = 271619712.

The previous prime is 681073609. The next prime is 681073637. The reversal of 681073630 is 36370186.

It is a super-2 number, since 2×681073630² = 927722578962753800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681073637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97680 + ... + 104419.

It is an arithmetic number, because the mean of its divisors is an integer number (76848525).

Almost surely, 2^681073630 is an apocalyptic number.

681073630 is a deficient number, since it is larger than the sum of its proper divisors (548502770).

681073630 is a wasteful number, since it uses less digits than its factorization.

681073630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202443.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 681073630 is about 26097.3874171343. The cubic root of 681073630 is about 879.8284918859.

The spelling of 681073630 in words is "six hundred eighty-one million, seventy-three thousand, six hundred thirty".