400553402323 has 16 divisors (see below), whose sum is σ = 436781376000. Its totient is φ = 365876475552.

The previous prime is 400553402321. The next prime is 400553402351. The reversal of 400553402323 is 323204355004.

It is not a de Polignac number, because 400553402323 - 2¹ = 400553402321 is a prime.

It is a super-2 number, since 2×400553402323² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400553402321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109365 + ... + 901702.

It is an arithmetic number, because the mean of its divisors is an integer number (27298836000).

Almost surely, 2^400553402323 is an apocalyptic number.

400553402323 is a deficient number, since it is larger than the sum of its proper divisors (36227973677).

400553402323 is a wasteful number, since it uses less digits than its factorization.

400553402323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011834.

The product of its (nonzero) digits is 43200, while the sum is 31.

Adding to 400553402323 its reverse (323204355004), we get a palindrome (723757757327).

The spelling of 400553402323 in words is "four hundred billion, five hundred fifty-three million, four hundred two thousand, three hundred twenty-three".