400726202215640 has 128 divisors (see below), whose sum is σ = 1058509894440960. Its totient is φ = 133650582557184.

The previous prime is 400726202215631. The next prime is 400726202215673. The reversal of 400726202215640 is 46512202627004.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 45508379 + ... + 53595381.

It is an arithmetic number, because the mean of its divisors is an integer number (8269608550320).

Almost surely, 2^{400726202215640} is an apocalyptic number.

400726202215640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400726202215640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (529254947220480).

400726202215640 is an abundant number, since it is smaller than the sum of its proper divisors (657783692225320).

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

400726202215640 is a wasteful number, since it uses less digits than its factorization.

400726202215640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8091841 (or 8091837 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 41.

The spelling of 400726202215640 in words is "four hundred trillion, seven hundred twenty-six billion, two hundred two million, two hundred fifteen thousand, six hundred forty".