400251204055 has 64 divisors (see below), whose sum is σ = 522294220800. Its totient is φ = 293482414080.

The previous prime is 400251204037. The next prime is 400251204077. The reversal of 400251204055 is 550402152004.

It is not a de Polignac number, because 400251204055 - 2¹⁷ = 400251072983 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 311964444 + ... + 311965726.

It is an arithmetic number, because the mean of its divisors is an integer number (8160847200).

Almost surely, 2^400251204055 is an apocalyptic number.

400251204055 is a deficient number, since it is larger than the sum of its proper divisors (122043016745).

400251204055 is a wasteful number, since it uses less digits than its factorization.

400251204055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2104.

The product of its (nonzero) digits is 8000, while the sum is 28.

Adding to 400251204055 its reverse (550402152004), we get a palindrome (950653356059).

The spelling of 400251204055 in words is "four hundred billion, two hundred fifty-one million, two hundred four thousand, fifty-five".