420879633556 has 12 divisors (see below), whose sum is σ = 754503733620. Its totient is φ = 205307138240.

The previous prime is 420879633511. The next prime is 420879633571. The reversal of 420879633556 is 655336978024.

It can be written as a sum of positive squares in 2 ways, for example, as 91270452100 + 329609181456 = 302110^2 + 574116^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 420879633556.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1283169451 + ... + 1283169778.

It is an arithmetic number, because the mean of its divisors is an integer number (62875311135).

Almost surely, 2^420879633556 is an apocalyptic number.

It is an amenable number.

420879633556 is a deficient number, since it is larger than the sum of its proper divisors (333624100064).

420879633556 is a wasteful number, since it uses less digits than its factorization.

420879633556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2566339274 (or 2566339272 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 58.

The spelling of 420879633556 in words is "four hundred twenty billion, eight hundred seventy-nine million, six hundred thirty-three thousand, five hundred fifty-six".