1420227859681 has 4 divisors (see below), whose sum is σ = 1430594486532. Its totient is φ = 1409861232832.

The previous prime is 1420227859679. The next prime is 1420227859723. The reversal of 1420227859681 is 1869587220241.

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 293456224656 + 1126771635025 = 541716^2 + 1061495^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420227859681 - 2¹ = 1420227859679 is a prime.

It is a super-2 number, since 2×1420227859681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1420227859651) by changing a digit.

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, 5183313220 + ... + 5183313493.

It is an arithmetic number, because the mean of its divisors is an integer number (357648621633).

Almost surely, 2^{1420227859681} is an apocalyptic number.

It is an amenable number.

1420227859681 is a deficient number, since it is larger than the sum of its proper divisors (10366626851).

1420227859681 is a wasteful number, since it uses less digits than its factorization.

1420227859681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10366626850.

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 1420227859681 in words is "one trillion, four hundred twenty billion, two hundred twenty-seven million, eight hundred fifty-nine thousand, six hundred eighty-one".