400785216049 has 2 divisors, whose sum is σ = 400785216050. Its totient is φ = 400785216048.

The previous prime is 400785215993. The next prime is 400785216107. The reversal of 400785216049 is 940612587004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 307847425600 + 92937790449 = 554840^2 + 304857^2 .

It is a cyclic number.

It is not a de Polignac number, because 400785216049 - 2¹³ = 400785207857 is a prime.

It is not a weakly prime, because it can be changed into another prime (400785216149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200392608024 + 200392608025.

It is an arithmetic number, because the mean of its divisors is an integer number (200392608025).

Almost surely, 2^400785216049 is an apocalyptic number.

It is an amenable number.

400785216049 is a deficient number, since it is larger than the sum of its proper divisors (1).

400785216049 is an equidigital number, since it uses as much as digits as its factorization.

400785216049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 400785216049 in words is "four hundred billion, seven hundred eighty-five million, two hundred sixteen thousand, forty-nine".