421566390001 has 8 divisors (see below), whose sum is σ = 436182604200. Its totient is φ = 406955472000.

The previous prime is 421566389999. The next prime is 421566390023. The reversal of 421566390001 is 100093665124.

It can be written as a sum of positive squares in 4 ways, for example, as 148872505600 + 272693884401 = 385840^2 + 522201^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421566390001 - 2¹ = 421566389999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421566390061) 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 7 ways as a sum of consecutive naturals, for example, 1161756 + ... + 1480813.

It is an arithmetic number, because the mean of its divisors is an integer number (54522825525).

Almost surely, 2^421566390001 is an apocalyptic number.

It is an amenable number.

421566390001 is a deficient number, since it is larger than the sum of its proper divisors (14616214199).

421566390001 is a wasteful number, since it uses less digits than its factorization.

421566390001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2648099.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 421566390001 in words is "four hundred twenty-one billion, five hundred sixty-six million, three hundred ninety thousand, one".