400042195849 has 2 divisors, whose sum is σ = 400042195850. Its totient is φ = 400042195848.

The previous prime is 400042195831. The next prime is 400042195867. The reversal of 400042195849 is 948591240004.

It is a balanced prime because it is at equal distance from previous prime (400042195831) and next prime (400042195867).

It can be written as a sum of positive squares in only one way, i.e., 218923859449 + 181118336400 = 467893^2 + 425580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400042195849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400042195799 and 400042195808.

It is not a weakly prime, because it can be changed into another prime (400042195829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200021097924 + 200021097925.

It is an arithmetic number, because the mean of its divisors is an integer number (200021097925).

Almost surely, 2^400042195849 is an apocalyptic number.

It is an amenable number.

400042195849 is a deficient number, since it is larger than the sum of its proper divisors (1).

400042195849 is an equidigital number, since it uses as much as digits as its factorization.

400042195849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 400042195849 in words is "four hundred billion, forty-two million, one hundred ninety-five thousand, eight hundred forty-nine".