8461992785 has 4 divisors (see below), whose sum is σ = 10154391348. Its totient is φ = 6769594224.

The previous prime is 8461992761. The next prime is 8461992793. The reversal of 8461992785 is 5872991648.

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

It can be written as a sum of positive squares in 2 ways, for example, as 906732544 + 7555260241 = 30112^2 + 86921^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8461992785 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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 846199274 + ... + 846199283.

It is an arithmetic number, because the mean of its divisors is an integer number (2538597837).

Almost surely, 2^8461992785 is an apocalyptic number.

It is an amenable number.

8461992785 is a deficient number, since it is larger than the sum of its proper divisors (1692398563).

8461992785 is a wasteful number, since it uses less digits than its factorization.

8461992785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692398562.

The product of its digits is 8709120, while the sum is 59.

The square root of 8461992785 is about 91989.0905760025. The cubic root of 8461992785 is about 2037.7811952603.

The spelling of 8461992785 in words is "eight billion, four hundred sixty-one million, nine hundred ninety-two thousand, seven hundred eighty-five".