855663464477 has 32 divisors (see below), whose sum is σ = 930499920000. Its totient is φ = 784164326400.

The previous prime is 855663464437. The next prime is 855663464479. The reversal of 855663464477 is 774464366558.

It is a cyclic number.

It is not a de Polignac number, because 855663464477 - 2²⁰ = 855662415901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855663464479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60043649 + ... + 60057897.

It is an arithmetic number, because the mean of its divisors is an integer number (29078122500).

Almost surely, 2^855663464477 is an apocalyptic number.

It is an amenable number.

855663464477 is a deficient number, since it is larger than the sum of its proper divisors (74836455523).

855663464477 is a wasteful number, since it uses less digits than its factorization.

855663464477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14957.

The product of its digits is 406425600, while the sum is 65.

The spelling of 855663464477 in words is "eight hundred fifty-five billion, six hundred sixty-three million, four hundred sixty-four thousand, four hundred seventy-seven".