681095515 has 4 divisors (see below), whose sum is σ = 817314624. Its totient is φ = 544876408.

The previous prime is 681095501. The next prime is 681095521. The reversal of 681095515 is 515590186.

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 681095515 - 2⁵ = 681095483 is a prime.

It is a super-2 number, since 2×681095515² = 927782201106230450, which contains 22 as substring.

It is a Duffinian 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, 68109547 + ... + 68109556.

It is an arithmetic number, because the mean of its divisors is an integer number (204328656).

Almost surely, 2^681095515 is an apocalyptic number.

681095515 is a deficient number, since it is larger than the sum of its proper divisors (136219109).

681095515 is a wasteful number, since it uses less digits than its factorization.

681095515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136219108.

The product of its (nonzero) digits is 54000, while the sum is 40.

The square root of 681095515 is about 26097.8067086106. The cubic root of 681095515 is about 879.8379156542.

The spelling of 681095515 in words is "six hundred eighty-one million, ninety-five thousand, five hundred fifteen".