861948055 has 8 divisors (see below), whose sum is σ = 1040926752. Its totient is φ = 685165728.

The previous prime is 861948019. The next prime is 861948071. The reversal of 861948055 is 550849168.

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 861948055 - 2⁷ = 861947927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 861947996 and 861948014.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 548227 + ... + 549796.

It is an arithmetic number, because the mean of its divisors is an integer number (130115844).

Almost surely, 2^861948055 is an apocalyptic number.

861948055 is a deficient number, since it is larger than the sum of its proper divisors (178978697).

861948055 is a wasteful number, since it uses less digits than its factorization.

861948055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098185.

The product of its (nonzero) digits is 345600, while the sum is 46.

The square root of 861948055 is about 29358.9518716183. The cubic root of 861948055 is about 951.6860382055.

It can be divided in two parts, 86194 and 8055, that added together give a palindrome (94249).

The spelling of 861948055 in words is "eight hundred sixty-one million, nine hundred forty-eight thousand, fifty-five".