401472720646 has 8 divisors (see below), whose sum is σ = 603681476040. Its totient is φ = 200245561968.

The previous prime is 401472720637. The next prime is 401472720679. The reversal of 401472720646 is 646027274104.

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

It is a super-2 number, since 2×401472720646² (a number of 24 digits) contains 22 as substring.

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, 245398156 + ... + 245399791.

It is an arithmetic number, because the mean of its divisors is an integer number (75460184505).

Almost surely, 2^401472720646 is an apocalyptic number.

401472720646 is a deficient number, since it is larger than the sum of its proper divisors (202208755394).

401472720646 is a wasteful number, since it uses less digits than its factorization.

401472720646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490798358.

The product of its (nonzero) digits is 451584, while the sum is 43.

The spelling of 401472720646 in words is "four hundred one billion, four hundred seventy-two million, seven hundred twenty thousand, six hundred forty-six".