860551645 has 8 divisors (see below), whose sum is σ = 1093406904. Its totient is φ = 647944704.

The previous prime is 860551631. The next prime is 860551691. The reversal of 860551645 is 546155068.

It can be written as a sum of positive squares in 4 ways, for example, as 372760249 + 487791396 = 19307^2 + 22086^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 860551645 - 2¹⁵ = 860518877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 860551598 and 860551607.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 5061984 + ... + 5062153.

It is an arithmetic number, because the mean of its divisors is an integer number (136675863).

Almost surely, 2^860551645 is an apocalyptic number.

860551645 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

860551645 is a deficient number, since it is larger than the sum of its proper divisors (232855259).

860551645 is a wasteful number, since it uses less digits than its factorization.

860551645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10124159.

The product of its (nonzero) digits is 144000, while the sum is 40.

The square root of 860551645 is about 29335.1605586198. The cubic root of 860551645 is about 951.1718300321.

The spelling of 860551645 in words is "eight hundred sixty million, five hundred fifty-one thousand, six hundred forty-five".