404813506780 has 24 divisors (see below), whose sum is σ = 850159023840. Its totient is φ = 161915753280.

The previous prime is 404813506687. The next prime is 404813506787. The reversal of 404813506780 is 87605318404.

It is a happy number.

It is a super-2 number, since 2×404813506780² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 404813506780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404813506787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254160 + ... + 934999.

It is an arithmetic number, because the mean of its divisors is an integer number (35423292660).

Almost surely, 2^404813506780 is an apocalyptic number.

It is an amenable number.

404813506780 is an abundant number, since it is smaller than the sum of its proper divisors (445345517060).

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

404813506780 is a wasteful number, since it uses less digits than its factorization.

404813506780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206189 (or 1206187 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 404813506780 in words is "four hundred four billion, eight hundred thirteen million, five hundred six thousand, seven hundred eighty".