400145241505 has 4 divisors (see below), whose sum is σ = 480174289812. Its totient is φ = 320116193200.

The previous prime is 400145241499. The next prime is 400145241523. The reversal of 400145241505 is 505142541004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 312980945809 + 87164295696 = 559447^2 + 295236^2 .

It is not a de Polignac number, because 400145241505 - 2⁹ = 400145240993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40014524146 + ... + 40014524155.

It is an arithmetic number, because the mean of its divisors is an integer number (120043572453).

Almost surely, 2^400145241505 is an apocalyptic number.

It is an amenable number.

400145241505 is a deficient number, since it is larger than the sum of its proper divisors (80029048307).

400145241505 is an equidigital number, since it uses as much as digits as its factorization.

400145241505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80029048306.

The product of its (nonzero) digits is 16000, while the sum is 31.

Adding to 400145241505 its reverse (505142541004), we get a palindrome (905287782509).

The spelling of 400145241505 in words is "four hundred billion, one hundred forty-five million, two hundred forty-one thousand, five hundred five".