400232507647 has 4 divisors (see below), whose sum is σ = 457408580176. Its totient is φ = 343056435120.

The previous prime is 400232507627. The next prime is 400232507657. The reversal of 400232507647 is 746705232004.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-400232507647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400232507627) 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, 28588036254 + ... + 28588036267.

It is an arithmetic number, because the mean of its divisors is an integer number (114352145044).

Almost surely, 2^400232507647 is an apocalyptic number.

400232507647 is a deficient number, since it is larger than the sum of its proper divisors (57176072529).

400232507647 is an equidigital number, since it uses as much as digits as its factorization.

400232507647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57176072528.

The product of its (nonzero) digits is 282240, while the sum is 40.

The spelling of 400232507647 in words is "four hundred billion, two hundred thirty-two million, five hundred seven thousand, six hundred forty-seven".