400543122151044 has 72 divisors (see below), whose sum is σ = 1082656162020888. Its totient is φ = 124416423091200.

The previous prime is 400543122151013. The next prime is 400543122151169. The reversal of 400543122151044 is 440151221345004.

400543122151044 is a `hidden beast` number, since 4 + 0 + 0 + 5 + 431 + 2 + 215 + 1 + 0 + 4 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 322657872782400 + 77885249368644 = 17962680^2 + 8825262^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3239949207 + ... + 3240072830.

It is an arithmetic number, because the mean of its divisors is an integer number (15036891139179).

Almost surely, 2^{400543122151044} is an apocalyptic number.

It is an amenable number.

400543122151044 is an abundant number, since it is smaller than the sum of its proper divisors (682113039869844).

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

400543122151044 is a wasteful number, since it uses less digits than its factorization.

400543122151044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6480022165 (or 6480022160 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 400543122151044 its reverse (440151221345004), we get a palindrome (840694343496048).

The spelling of 400543122151044 in words is "four hundred trillion, five hundred forty-three billion, one hundred twenty-two million, one hundred fifty-one thousand, forty-four".