400061946469 has 2 divisors, whose sum is σ = 400061946470. Its totient is φ = 400061946468.

The previous prime is 400061946413. The next prime is 400061946551. The reversal of 400061946469 is 964649160004.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 398697530625 + 1364415844 = 631425^2 + 36938^2 .

It is a cyclic number.

It is not a de Polignac number, because 400061946469 - 2¹¹ = 400061944421 is a prime.

It is a super-2 number, since 2×400061946469² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400061946569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200030973234 + 200030973235.

It is an arithmetic number, because the mean of its divisors is an integer number (200030973235).

Almost surely, 2^400061946469 is an apocalyptic number.

It is an amenable number.

400061946469 is a deficient number, since it is larger than the sum of its proper divisors (1).

400061946469 is an equidigital number, since it uses as much as digits as its factorization.

400061946469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 49.

The spelling of 400061946469 in words is "four hundred billion, sixty-one million, nine hundred forty-six thousand, four hundred sixty-nine".