420613892156993 has 4 divisors (see below), whose sum is σ = 420613946784900. Its totient is φ = 420613837529088.

The previous prime is 420613892156933. The next prime is 420613892157007. The reversal of 420613892156993 is 399651298316024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 166288839461809 + 254325052695184 = 12895303^2 + 15947572^2 .

It is a cyclic number.

It is not a de Polignac number, because 420613892156993 - 2¹⁰ = 420613892155969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420613892156933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13402880 + ... + 31950977.

It is an arithmetic number, because the mean of its divisors is an integer number (105153486696225).

Almost surely, 2^{420613892156993} is an apocalyptic number.

It is an amenable number.

420613892156993 is a deficient number, since it is larger than the sum of its proper divisors (54627907).

420613892156993 is an equidigital number, since it uses as much as digits as its factorization.

420613892156993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54627906.

The product of its (nonzero) digits is 151165440, while the sum is 68.

The spelling of 420613892156993 in words is "four hundred twenty trillion, six hundred thirteen billion, eight hundred ninety-two million, one hundred fifty-six thousand, nine hundred ninety-three".