475777664820 has 144 divisors (see below), whose sum is σ = 1528335926208. Its totient is φ = 119391329280.

The previous prime is 475777664809. The next prime is 475777664827. The reversal of 475777664820 is 28466777574.

475777664820 is a `hidden beast` number, since 47 + 57 + 7 + 7 + 66 + 482 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (475777664827) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31238047 + ... + 31253273.

It is an arithmetic number, because the mean of its divisors is an integer number (10613443932).

Almost surely, 2^475777664820 is an apocalyptic number.

It is an amenable number.

475777664820 is an abundant number, since it is smaller than the sum of its proper divisors (1052558261388).

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

475777664820 is a wasteful number, since it uses less digits than its factorization.

475777664820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25470 (or 25465 counting only the distinct ones).

The product of its (nonzero) digits is 110638080, while the sum is 63.

The spelling of 475777664820 in words is "four hundred seventy-five billion, seven hundred seventy-seven million, six hundred sixty-four thousand, eight hundred twenty".