400413316323243 has 4 divisors (see below), whose sum is σ = 533884421764328. Its totient is φ = 266942210882160.

The previous prime is 400413316323239. The next prime is 400413316323281. The reversal of 400413316323243 is 342323613314004.

It is a happy number.

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

It is not a de Polignac number, because 400413316323243 - 2² = 400413316323239 is a prime.

It is a super-2 number, since 2×400413316323243² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400413316323283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66735552720538 + ... + 66735552720543.

It is an arithmetic number, because the mean of its divisors is an integer number (133471105441082).

Almost surely, 2^{400413316323243} is an apocalyptic number.

400413316323243 is a deficient number, since it is larger than the sum of its proper divisors (133471105441085).

400413316323243 is a wasteful number, since it uses less digits than its factorization.

400413316323243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133471105441084.

The product of its (nonzero) digits is 373248, while the sum is 39.

Adding to 400413316323243 its reverse (342323613314004), we get a palindrome (742736929637247).

The spelling of 400413316323243 in words is "four hundred trillion, four hundred thirteen billion, three hundred sixteen million, three hundred twenty-three thousand, two hundred forty-three".