4578824921812 has 6 divisors (see below), whose sum is σ = 8012943613178. Its totient is φ = 2289412460904.

The previous prime is 4578824921779. The next prime is 4578824921819. The reversal of 4578824921812 is 2181294288754.

It can be written as a sum of positive squares in only one way, i.e., 3188774489796 + 1390050432016 = 1785714^2 + 1179004^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4578824921819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572353115223 + ... + 572353115230.

Almost surely, 2^{4578824921812} is an apocalyptic number.

It is an amenable number.

4578824921812 is a deficient number, since it is larger than the sum of its proper divisors (3434118691366).

4578824921812 is a wasteful number, since it uses less digits than its factorization.

4578824921812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144706230457 (or 1144706230455 counting only the distinct ones).

The product of its digits is 20643840, while the sum is 61.

The spelling of 4578824921812 in words is "four trillion, five hundred seventy-eight billion, eight hundred twenty-four million, nine hundred twenty-one thousand, eight hundred twelve".