420077756408478 has 32 divisors (see below), whose sum is σ = 961780696819200. Its totient is φ = 119821845131040.

The previous prime is 420077756408477. The next prime is 420077756408483. The reversal of 420077756408478 is 874804657770024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420077756408477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8348765613 + ... + 8348815928.

It is an arithmetic number, because the mean of its divisors is an integer number (30055646775600).

Almost surely, 2^{420077756408478} is an apocalyptic number.

420077756408478 is an abundant number, since it is smaller than the sum of its proper divisors (541702940410722).

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

420077756408478 is a wasteful number, since it uses less digits than its factorization.

420077756408478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16697582152.

The product of its (nonzero) digits is 590069760, while the sum is 69.

The spelling of 420077756408478 in words is "four hundred twenty trillion, seventy-seven billion, seven hundred fifty-six million, four hundred eight thousand, four hundred seventy-eight".