421801314661 has 8 divisors (see below), whose sum is σ = 425828314944. Its totient is φ = 417779476800.

The previous prime is 421801314659. The next prime is 421801314689. The reversal of 421801314661 is 166413108124.

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 421801314661 - 2¹ = 421801314659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421801314661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421801314631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1126315 + ... + 1453336.

It is an arithmetic number, because the mean of its divisors is an integer number (53228539368).

Almost surely, 2^421801314661 is an apocalyptic number.

It is an amenable number.

421801314661 is a deficient number, since it is larger than the sum of its proper divisors (4027000283).

421801314661 is a wasteful number, since it uses less digits than its factorization.

421801314661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2581211.

The product of its (nonzero) digits is 27648, while the sum is 37.

The spelling of 421801314661 in words is "four hundred twenty-one billion, eight hundred one million, three hundred fourteen thousand, six hundred sixty-one".