861228851602144 has 48 divisors (see below), whose sum is σ = 1696986813892608. Its totient is φ = 430248176698752.

The previous prime is 861228851602129. The next prime is 861228851602267. The reversal of 861228851602144 is 441206158822168.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 265955449 + ... + 269174215.

It is an arithmetic number, because the mean of its divisors is an integer number (35353891956096).

Almost surely, 2^{861228851602144} is an apocalyptic number.

It is an amenable number.

861228851602144 is a deficient number, since it is larger than the sum of its proper divisors (835757962290464).

861228851602144 is a wasteful number, since it uses less digits than its factorization.

861228851602144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225887 (or 3225879 counting only the distinct ones).

The product of its (nonzero) digits is 11796480, while the sum is 58.

The spelling of 861228851602144 in words is "eight hundred sixty-one trillion, two hundred twenty-eight billion, eight hundred fifty-one million, six hundred two thousand, one hundred forty-four".