406646421451 has 8 divisors (see below), whose sum is σ = 418370870880. Its totient is φ = 394960603968.

The previous prime is 406646421431. The next prime is 406646421457. The reversal of 406646421451 is 154124646604.

It is a happy number.

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 406646421451 - 2³³ = 398056486859 is a prime.

It is a super-2 number, since 2×406646421451² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 406646421398 and 406646421407.

It is not an unprimeable number, because it can be changed into a prime (406646421457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9636631 + ... + 9678736.

It is an arithmetic number, because the mean of its divisors is an integer number (52296358860).

Almost surely, 2^406646421451 is an apocalyptic number.

406646421451 is a deficient number, since it is larger than the sum of its proper divisors (11724449429).

406646421451 is a wasteful number, since it uses less digits than its factorization.

406646421451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19315973.

The product of its (nonzero) digits is 552960, while the sum is 43.

The spelling of 406646421451 in words is "four hundred six billion, six hundred forty-six million, four hundred twenty-one thousand, four hundred fifty-one".