400212916643 has 2 divisors, whose sum is σ = 400212916644. Its totient is φ = 400212916642.

The previous prime is 400212916589. The next prime is 400212916657. The reversal of 400212916643 is 346619212004.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400212916643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400212916597 and 400212916606.

It is not a weakly prime, because it can be changed into another prime (400212916043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200106458321 + 200106458322.

It is an arithmetic number, because the mean of its divisors is an integer number (200106458322).

Almost surely, 2^400212916643 is an apocalyptic number.

400212916643 is a deficient number, since it is larger than the sum of its proper divisors (1).

400212916643 is an equidigital number, since it uses as much as digits as its factorization.

400212916643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 400212916643 in words is "four hundred billion, two hundred twelve million, nine hundred sixteen thousand, six hundred forty-three".