861317745 has 8 divisors (see below), whose sum is σ = 1378108416. Its totient is φ = 459369456.

The previous prime is 861317713. The next prime is 861317759. The reversal of 861317745 is 547713168.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 861317745 - 2⁵ = 861317713 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 861317697 and 861317706.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28710577 + ... + 28710606.

It is an arithmetic number, because the mean of its divisors is an integer number (172263552).

Almost surely, 2^861317745 is an apocalyptic number.

It is an amenable number.

861317745 is a deficient number, since it is larger than the sum of its proper divisors (516790671).

861317745 is a wasteful number, since it uses less digits than its factorization.

861317745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57421191.

The product of its digits is 141120, while the sum is 42.

The square root of 861317745 is about 29348.2153631188. The cubic root of 861317745 is about 951.4540043065.

The spelling of 861317745 in words is "eight hundred sixty-one million, three hundred seventeen thousand, seven hundred forty-five".