420236515285851 has 16 divisors (see below), whose sum is σ = 613244165643648. Its totient is φ = 253859191934400.

The previous prime is 420236515285781. The next prime is 420236515285907. The reversal of 420236515285851 is 158582515632024.

It is not a de Polignac number, because 420236515285851 - 2¹⁵ = 420236515253083 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420236515285791 and 420236515285800.

It is not an unprimeable number, because it can be changed into a prime (420236515785851) 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, 20740119930 + ... + 20740140191.

It is an arithmetic number, because the mean of its divisors is an integer number (38327760352728).

Almost surely, 2^{420236515285851} is an apocalyptic number.

420236515285851 is a deficient number, since it is larger than the sum of its proper divisors (193007650357797).

420236515285851 is a wasteful number, since it uses less digits than its factorization.

420236515285851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41480260442.

The product of its (nonzero) digits is 23040000, while the sum is 57.

The spelling of 420236515285851 in words is "four hundred twenty trillion, two hundred thirty-six billion, five hundred fifteen million, two hundred eighty-five thousand, eight hundred fifty-one".