401483639921 has 16 divisors (see below), whose sum is σ = 494153146368. Its totient is φ = 317644891200.

The previous prime is 401483639903. The next prime is 401483639939. The reversal of 401483639921 is 129936384104.

It is an interprime number because it is at equal distance from previous prime (401483639903) and next prime (401483639939).

It is not a de Polignac number, because 401483639921 - 2⁶ = 401483639857 is a prime.

It is a super-4 number, since 4×401483639921⁴ (a number of 48 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 401483639921.

It is not an unprimeable number, because it can be changed into a prime (401483639981) 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, 2744336 + ... + 2886926.

It is an arithmetic number, because the mean of its divisors is an integer number (30884571648).

Almost surely, 2^401483639921 is an apocalyptic number.

It is an amenable number.

401483639921 is a deficient number, since it is larger than the sum of its proper divisors (92669506447).

401483639921 is a wasteful number, since it uses less digits than its factorization.

401483639921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173552.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 401483639921 in words is "four hundred one billion, four hundred eighty-three million, six hundred thirty-nine thousand, nine hundred twenty-one".