681874615 has 8 divisors (see below), whose sum is σ = 818810928. Its totient is φ = 545125440.

The previous prime is 681874579. The next prime is 681874643. The reversal of 681874615 is 516478186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 681874615 - 2²¹ = 679777463 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 7 ways as a sum of consecutive naturals, for example, 38637 + ... + 53446.

It is an arithmetic number, because the mean of its divisors is an integer number (102351366).

Almost surely, 2^681874615 is an apocalyptic number.

681874615 is a deficient number, since it is larger than the sum of its proper divisors (136936313).

681874615 is a wasteful number, since it uses less digits than its factorization.

681874615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93569.

The product of its digits is 322560, while the sum is 46.

The square root of 681874615 is about 26112.7289841564. The cubic root of 681874615 is about 880.1732677933.

The spelling of 681874615 in words is "six hundred eighty-one million, eight hundred seventy-four thousand, six hundred fifteen".