400321322077 has 2 divisors, whose sum is σ = 400321322078. Its totient is φ = 400321322076.

The previous prime is 400321322057. The next prime is 400321322119. The reversal of 400321322077 is 770223123004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228841683876 + 171479638201 = 478374^2 + 414101^2 .

It is a cyclic number.

It is not a de Polignac number, because 400321322077 - 2³¹ = 398173838429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400321322057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200160661038 + 200160661039.

It is an arithmetic number, because the mean of its divisors is an integer number (200160661039).

Almost surely, 2^400321322077 is an apocalyptic number.

It is an amenable number.

400321322077 is a deficient number, since it is larger than the sum of its proper divisors (1).

400321322077 is an equidigital number, since it uses as much as digits as its factorization.

400321322077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 31.

The spelling of 400321322077 in words is "four hundred billion, three hundred twenty-one million, three hundred twenty-two thousand, seventy-seven".