421360311665 has 16 divisors (see below), whose sum is σ = 506566645200. Its totient is φ = 336465887232.

The previous prime is 421360311641. The next prime is 421360311737. The reversal of 421360311665 is 566113063124.

It can be written as a sum of positive squares in 8 ways, for example, as 4500263056 + 416860048609 = 67084^2 + 645647^2 .

It is a cyclic number.

It is not a de Polignac number, because 421360311665 - 2¹⁴ = 421360295281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7234199 + ... + 7292211.

It is an arithmetic number, because the mean of its divisors is an integer number (31660415325).

Almost surely, 2^421360311665 is an apocalyptic number.

It is an amenable number.

421360311665 is a deficient number, since it is larger than the sum of its proper divisors (85206333535).

421360311665 is a wasteful number, since it uses less digits than its factorization.

421360311665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60676.

The product of its (nonzero) digits is 77760, while the sum is 38.

Adding to 421360311665 its reverse (566113063124), we get a palindrome (987473374789).

The spelling of 421360311665 in words is "four hundred twenty-one billion, three hundred sixty million, three hundred eleven thousand, six hundred sixty-five".