681196415 has 4 divisors (see below), whose sum is σ = 817435704. Its totient is φ = 544957128.

The previous prime is 681196403. The next prime is 681196421. The reversal of 681196415 is 514691186.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-681196415 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68119637 + ... + 68119646.

It is an arithmetic number, because the mean of its divisors is an integer number (204358926).

Almost surely, 2^681196415 is an apocalyptic number.

681196415 is a deficient number, since it is larger than the sum of its proper divisors (136239289).

681196415 is a wasteful number, since it uses less digits than its factorization.

681196415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136239288.

The product of its digits is 51840, while the sum is 41.

The square root of 681196415 is about 26099.7397496603. The cubic root of 681196415 is about 879.8813609862.

The spelling of 681196415 in words is "six hundred eighty-one million, one hundred ninety-six thousand, four hundred fifteen".