400543265839 has 2 divisors, whose sum is σ = 400543265840. Its totient is φ = 400543265838.

The previous prime is 400543265819. The next prime is 400543265873. The reversal of 400543265839 is 938562345004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400543265839 - 2³⁵ = 366183527471 is a prime.

It is a super-4 number, since 4×400543265839⁴ (a number of 48 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400543265792 and 400543265801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400543265819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200271632919 + 200271632920.

It is an arithmetic number, because the mean of its divisors is an integer number (200271632920).

Almost surely, 2^400543265839 is an apocalyptic number.

400543265839 is a deficient number, since it is larger than the sum of its proper divisors (1).

400543265839 is an equidigital number, since it uses as much as digits as its factorization.

400543265839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3110400, while the sum is 49.

The spelling of 400543265839 in words is "four hundred billion, five hundred forty-three million, two hundred sixty-five thousand, eight hundred thirty-nine".