861135744676 has 9 divisors (see below), whose sum is σ = 1506990801099. Its totient is φ = 430566944364.

The previous prime is 861135744649. The next prime is 861135744701. The reversal of 861135744676 is 676447531168.

It is a happy number.

The square root of 861135744676 is 927974.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 861135744676.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1623955 + ... + 2087941.

Almost surely, 2^861135744676 is an apocalyptic number.

861135744676 is the 927974-th square number.

It is an amenable number.

861135744676 is a deficient number, since it is larger than the sum of its proper divisors (645855056423).

861135744676 is an frugal number, since it uses more digits than its factorization.

861135744676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927978 (or 463989 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 58.

The spelling of 861135744676 in words is "eight hundred sixty-one billion, one hundred thirty-five million, seven hundred forty-four thousand, six hundred seventy-six".