400331606624 has 48 divisors (see below), whose sum is σ = 810327823200. Its totient is φ = 194545741824.

The previous prime is 400331606617. The next prime is 400331606651. The reversal of 400331606624 is 426606133004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 917957 + ... + 1281915.

It is an arithmetic number, because the mean of its divisors is an integer number (16881829650).

Almost surely, 2^400331606624 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 400331606624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (405163911600).

400331606624 is an abundant number, since it is smaller than the sum of its proper divisors (409996216576).

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

400331606624 is a wasteful number, since it uses less digits than its factorization.

400331606624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364935 (or 364927 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 35.

Adding to 400331606624 its reverse (426606133004), we get a palindrome (826937739628).

The spelling of 400331606624 in words is "four hundred billion, three hundred thirty-one million, six hundred six thousand, six hundred twenty-four".