401472720647 has 16 divisors (see below), whose sum is σ = 427467124224. Its totient is φ = 375744000000.

The previous prime is 401472720637. The next prime is 401472720679. The reversal of 401472720647 is 746027274104.

It is a cyclic number.

It is not a de Polignac number, because 401472720647 - 2¹⁰ = 401472719623 is a prime.

It is a super-2 number, since 2×401472720647² (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 = 401472720598 and 401472720607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401472720637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9723647 + ... + 9764847.

It is an arithmetic number, because the mean of its divisors is an integer number (26716695264).

Almost surely, 2^401472720647 is an apocalyptic number.

401472720647 is a deficient number, since it is larger than the sum of its proper divisors (25994403577).

401472720647 is a wasteful number, since it uses less digits than its factorization.

401472720647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44410.

The product of its (nonzero) digits is 526848, while the sum is 44.

The spelling of 401472720647 in words is "four hundred one billion, four hundred seventy-two million, seven hundred twenty thousand, six hundred forty-seven".