681577115 has 4 divisors (see below), whose sum is σ = 817892544. Its totient is φ = 545261688.

The previous prime is 681577103. The next prime is 681577121. The reversal of 681577115 is 511775186.

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

It is a cyclic number.

It is not a de Polignac number, because 681577115 - 2¹⁸ = 681314971 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 68157707 + ... + 68157716.

It is an arithmetic number, because the mean of its divisors is an integer number (204473136).

Almost surely, 2^681577115 is an apocalyptic number.

681577115 is a deficient number, since it is larger than the sum of its proper divisors (136315429).

681577115 is a wasteful number, since it uses less digits than its factorization.

681577115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136315428.

The product of its digits is 58800, while the sum is 41.

The square root of 681577115 is about 26107.0319071318. The cubic root of 681577115 is about 880.0452434555.

The spelling of 681577115 in words is "six hundred eighty-one million, five hundred seventy-seven thousand, one hundred fifteen".