400400036441 has 2 divisors, whose sum is σ = 400400036442. Its totient is φ = 400400036440.

The previous prime is 400400036381. The next prime is 400400036453. The reversal of 400400036441 is 144630004004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 236351545600 + 164048490841 = 486160^2 + 405029^2 .

It is a cyclic number.

It is not a de Polignac number, because 400400036441 - 2¹⁴ = 400400020057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400400036441.

It is not a weakly prime, because it can be changed into another prime (400400096441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200200018220 + 200200018221.

It is an arithmetic number, because the mean of its divisors is an integer number (200200018221).

Almost surely, 2^400400036441 is an apocalyptic number.

It is an amenable number.

400400036441 is a deficient number, since it is larger than the sum of its proper divisors (1).

400400036441 is an equidigital number, since it uses as much as digits as its factorization.

400400036441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 26.

The spelling of 400400036441 in words is "four hundred billion, four hundred million, thirty-six thousand, four hundred forty-one".