400605730253 has 4 divisors (see below), whose sum is σ = 400609800060. Its totient is φ = 400601660448.

The previous prime is 400605730247. The next prime is 400605730289. The reversal of 400605730253 is 352037506004.

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 128108158084 + 272497572169 = 357922^2 + 522013^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400605730253 is a prime.

It is a super-2 number, since 2×400605730253² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400605730153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1883498 + ... + 2085371.

It is an arithmetic number, because the mean of its divisors is an integer number (100152450015).

Almost surely, 2^400605730253 is an apocalyptic number.

It is an amenable number.

400605730253 is a deficient number, since it is larger than the sum of its proper divisors (4069807).

400605730253 is a wasteful number, since it uses less digits than its factorization.

400605730253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4069806.

The product of its (nonzero) digits is 75600, while the sum is 35.

The spelling of 400605730253 in words is "four hundred billion, six hundred five million, seven hundred thirty thousand, two hundred fifty-three".