861758545 has 8 divisors (see below), whose sum is σ = 1035374760. Its totient is φ = 688563840.

The previous prime is 861758537. The next prime is 861758561. The reversal of 861758545 is 545857168.

861758545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 151216209 + 710542336 = 12297^2 + 26656^2 .

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

It is not a de Polignac number, because 861758545 - 2³ = 861758537 is a prime.

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, 100860 + ... + 109069.

It is an arithmetic number, because the mean of its divisors is an integer number (129421845).

Almost surely, 2^861758545 is an apocalyptic number.

It is an amenable number.

861758545 is a deficient number, since it is larger than the sum of its proper divisors (173616215).

861758545 is a wasteful number, since it uses less digits than its factorization.

861758545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210755.

The product of its digits is 1344000, while the sum is 49.

The square root of 861758545 is about 29355.7242288450. The cubic root of 861758545 is about 951.6162864227.

The spelling of 861758545 in words is "eight hundred sixty-one million, seven hundred fifty-eight thousand, five hundred forty-five".