400144437500 has 42 divisors (see below), whose sum is σ = 875304889704. Its totient is φ = 160057750000.

The previous prime is 400144437461. The next prime is 400144437527. The reversal of 400144437500 is 5734441004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 3138656 + ... + 3263655.

It is an arithmetic number, because the mean of its divisors is an integer number (20840592612).

Almost surely, 2^400144437500 is an apocalyptic number.

It is an amenable number.

400144437500 is an abundant number, since it is smaller than the sum of its proper divisors (475160452204).

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

400144437500 is an frugal number, since it uses more digits than its factorization.

400144437500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6402345 (or 6402318 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 32.

Adding to 400144437500 its reverse (5734441004), we get a palindrome (405878878504).

The spelling of 400144437500 in words is "four hundred billion, one hundred forty-four million, four hundred thirty-seven thousand, five hundred".