285477780468 has 12 divisors (see below), whose sum is σ = 666114821120. Its totient is φ = 95159260152.

The previous prime is 285477780461. The next prime is 285477780481. The reversal of 285477780468 is 864087774582.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 285477780399 and 285477780408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285477780461) by changing a digit.

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, 11894907508 + ... + 11894907531.

Almost surely, 2^285477780468 is an apocalyptic number.

It is an amenable number.

285477780468 is an abundant number, since it is smaller than the sum of its proper divisors (380637040652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285477780468 is a wasteful number, since it uses less digits than its factorization.

285477780468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23789815046 (or 23789815044 counting only the distinct ones).

The product of its (nonzero) digits is 168591360, while the sum is 66.

The spelling of 285477780468 in words is "two hundred eighty-five billion, four hundred seventy-seven million, seven hundred eighty thousand, four hundred sixty-eight".