861547814416 has 15 divisors (see below), whose sum is σ = 1669256083981. Its totient is φ = 430772050816.

The previous prime is 861547814399. The next prime is 861547814419. The reversal of 861547814416 is 614418745168.

The square root of 861547814416 is 928196.

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

It can be written as a sum of positive squares in only one way, i.e., 584619276816 + 276928537600 = 764604^2 + 526240^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861547814419) by changing a digit.

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 2 ways as a sum of consecutive naturals, for example, 3596760 + ... + 3828808.

Almost surely, 2^861547814416 is an apocalyptic number.

861547814416 is the 928196-th square number.

It is an amenable number.

861547814416 is a deficient number, since it is larger than the sum of its proper divisors (807708269565).

861547814416 is an frugal number, since it uses more digits than its factorization.

861547814416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464106 (or 232051 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 55.

The spelling of 861547814416 in words is "eight hundred sixty-one billion, five hundred forty-seven million, eight hundred fourteen thousand, four hundred sixteen".