8461617487 has 4 divisors (see below), whose sum is σ = 8467046640. Its totient is φ = 8456188336.

The previous prime is 8461617467. The next prime is 8461617497. The reversal of 8461617487 is 7847161648.

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-8461617487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8461617467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2712238 + ... + 2715355.

It is an arithmetic number, because the mean of its divisors is an integer number (2116761660).

Almost surely, 2^8461617487 is an apocalyptic number.

8461617487 is a deficient number, since it is larger than the sum of its proper divisors (5429153).

8461617487 is a wasteful number, since it uses less digits than its factorization.

8461617487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5429152.

The product of its digits is 1806336, while the sum is 52.

The square root of 8461617487 is about 91987.0506484473. The cubic root of 8461617487 is about 2037.7510689243.

The spelling of 8461617487 in words is "eight billion, four hundred sixty-one million, six hundred seventeen thousand, four hundred eighty-seven".