861963000506 has 8 divisors (see below), whose sum is σ = 1292948860980. Its totient is φ = 430980046848.

The previous prime is 861963000413. The next prime is 861963000527. The reversal of 861963000506 is 605000369168.

It can be written as a sum of positive squares in 2 ways, for example, as 837973637281 + 23989363225 = 915409^2 + 154885^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310970 + ... + 1349306.

Almost surely, 2^861963000506 is an apocalyptic number.

861963000506 is a deficient number, since it is larger than the sum of its proper divisors (430985860474).

861963000506 is a wasteful number, since it uses less digits than its factorization.

861963000506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453408.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 861963000506 in words is "eight hundred sixty-one billion, nine hundred sixty-three million, five hundred six", and thus it is an aban number.