401533389504 has 504 divisors, whose sum is σ = 1293844690944. Its totient is φ = 118879488000.

The previous prime is 401533389503. The next prime is 401533389559. The reversal of 401533389504 is 405983335104.

It is a super-2 number, since 2×401533389504² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401533389504.

It is not an unprimeable number, because it can be changed into a prime (401533389503) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 817786699 + ... + 817787189.

Almost surely, 2^401533389504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401533389504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (646922345472).

401533389504 is an abundant number, since it is smaller than the sum of its proper divisors (892311301440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401533389504 is a wasteful number, since it uses less digits than its factorization.

401533389504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837 (or 811 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 401533389504 in words is "four hundred one billion, five hundred thirty-three million, three hundred eighty-nine thousand, five hundred four".