401506464321 has 24 divisors (see below), whose sum is σ = 618903926784. Its totient is φ = 249941946240.

The previous prime is 401506464277. The next prime is 401506464329. The reversal of 401506464321 is 123464605104.

401506464321 is a `hidden beast` number, since 4 + 0 + 1 + 5 + 0 + 6 + 4 + 643 + 2 + 1 = 666.

It is not a de Polignac number, because 401506464321 - 2²⁷ = 401372246593 is a prime.

It is a super-2 number, since 2×401506464321² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401506464329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10312165 + ... + 10351026.

It is an arithmetic number, because the mean of its divisors is an integer number (25787663616).

Almost surely, 2^401506464321 is an apocalyptic number.

It is an amenable number.

401506464321 is a deficient number, since it is larger than the sum of its proper divisors (217397462463).

401506464321 is a wasteful number, since it uses less digits than its factorization.

401506464321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20663341 (or 20663338 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 401506464321 in words is "four hundred one billion, five hundred six million, four hundred sixty-four thousand, three hundred twenty-one".