400365046643 has 4 divisors (see below), whose sum is σ = 417772222608. Its totient is φ = 382957870680.

The previous prime is 400365046633. The next prime is 400365046651. The reversal of 400365046643 is 346640563004.

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

It is a cyclic number.

It is not a de Polignac number, because 400365046643 - 2²⁶ = 400297937779 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400365046643.

It is not an unprimeable number, because it can be changed into a prime (400365046633) 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, 8703587948 + ... + 8703587993.

It is an arithmetic number, because the mean of its divisors is an integer number (104443055652).

Almost surely, 2^400365046643 is an apocalyptic number.

400365046643 is a deficient number, since it is larger than the sum of its proper divisors (17407175965).

400365046643 is a wasteful number, since it uses less digits than its factorization.

400365046643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17407175964.

The product of its (nonzero) digits is 622080, while the sum is 41.

The spelling of 400365046643 in words is "four hundred billion, three hundred sixty-five million, forty-six thousand, six hundred forty-three".