406213555646 has 8 divisors (see below), whose sum is σ = 645162706080. Its totient is φ = 191159320288.

The previous prime is 406213555619. The next prime is 406213555661. The reversal of 406213555646 is 646555312604.

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

It is a self number, because there is not a number n which added to its sum of digits gives 406213555646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5973728726 + ... + 5973728793.

It is an arithmetic number, because the mean of its divisors is an integer number (80645338260).

Almost surely, 2^406213555646 is an apocalyptic number.

406213555646 is a deficient number, since it is larger than the sum of its proper divisors (238949150434).

406213555646 is a wasteful number, since it uses less digits than its factorization.

406213555646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11947457538.

The product of its (nonzero) digits is 2592000, while the sum is 47.

The spelling of 406213555646 in words is "four hundred six billion, two hundred thirteen million, five hundred fifty-five thousand, six hundred forty-six".