401401020399 has 8 divisors (see below), whose sum is σ = 549666262320. Its totient is φ = 260368229376.

The previous prime is 401401020373. The next prime is 401401020407. The reversal of 401401020399 is 993020104104.

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

It is not a de Polignac number, because 401401020399 - 2³¹ = 399253536751 is a prime.

It is a super-2 number, since 2×401401020399² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401401020299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1808112594 + ... + 1808112815.

It is an arithmetic number, because the mean of its divisors is an integer number (68708282790).

Almost surely, 2^401401020399 is an apocalyptic number.

401401020399 is a deficient number, since it is larger than the sum of its proper divisors (148265241921).

401401020399 is a wasteful number, since it uses less digits than its factorization.

401401020399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3616225449.

The product of its (nonzero) digits is 7776, while the sum is 33.

The spelling of 401401020399 in words is "four hundred one billion, four hundred one million, twenty thousand, three hundred ninety-nine".