426772636430021 has 12 divisors (see below), whose sum is σ = 504588322902060. Its totient is φ = 359808311741760.

The previous prime is 426772636430003. The next prime is 426772636430029. The reversal of 426772636430021 is 120034636277624.

It can be written as a sum of positive squares in 2 ways, for example, as 168078545469121 + 258694090960900 = 12964511^2 + 16083970^2 .

It is not a de Polignac number, because 426772636430021 - 2¹⁰ = 426772636428997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426772636430029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71390535056 + ... + 71390541033.

It is an arithmetic number, because the mean of its divisors is an integer number (42049026908505).

Almost surely, 2^{426772636430021} is an apocalyptic number.

It is an amenable number.

426772636430021 is a deficient number, since it is larger than the sum of its proper divisors (77815686472039).

426772636430021 is a wasteful number, since it uses less digits than its factorization.

426772636430021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142781076164 (or 142781076157 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 53.

The spelling of 426772636430021 in words is "four hundred twenty-six trillion, seven hundred seventy-two billion, six hundred thirty-six million, four hundred thirty thousand, twenty-one".