861055498 has 4 divisors (see below), whose sum is σ = 1291583250. Its totient is φ = 430527748.

The previous prime is 861055493. The next prime is 861055511. The reversal of 861055498 is 894550168.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 854568289 + 6487209 = 29233^2 + 2547^2 .

It is not an unprimeable number, because it can be changed into a prime (861055493) 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 as a sum of consecutive naturals, namely, 215263873 + ... + 215263876.

Almost surely, 2^861055498 is an apocalyptic number.

861055498 is a deficient number, since it is larger than the sum of its proper divisors (430527752).

861055498 is a wasteful number, since it uses less digits than its factorization.

861055498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430527751.

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

The square root of 861055498 is about 29343.7471703939. The cubic root of 861055498 is about 951.3574308535.

The spelling of 861055498 in words is "eight hundred sixty-one million, fifty-five thousand, four hundred ninety-eight".