418364469721 has 27 divisors (see below), whose sum is σ = 464507830773. Its totient is φ = 376521619320.

The previous prime is 418364469631. The next prime is 418364469751. The reversal of 418364469721 is 127964463814.

It is a happy number.

The square root of 418364469721 is 646811.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 418364469721 - 2²¹ = 418362372569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (418364469751) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 903594736 + ... + 903595198.

Almost surely, 2^418364469721 is an apocalyptic number.

418364469721 is the 646811-st square number.

418364469721 is the 323406-th centered octagonal number.

It is an amenable number.

418364469721 is a deficient number, since it is larger than the sum of its proper divisors (46143361052).

418364469721 is an frugal number, since it uses more digits than its factorization.

418364469721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202 (or 601 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 55.

The spelling of 418364469721 in words is "four hundred eighteen billion, three hundred sixty-four million, four hundred sixty-nine thousand, seven hundred twenty-one".