400476257549 has 2 divisors, whose sum is σ = 400476257550. Its totient is φ = 400476257548.

The previous prime is 400476257513. The next prime is 400476257551. The reversal of 400476257549 is 945752674004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253292771524 + 147183486025 = 503282^2 + 383645^2 .

It is a cyclic number.

It is not a de Polignac number, because 400476257549 - 2¹² = 400476253453 is a prime.

Together with 400476257551, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400476257549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400476257579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200238128774 + 200238128775.

It is an arithmetic number, because the mean of its divisors is an integer number (200238128775).

Almost surely, 2^400476257549 is an apocalyptic number.

It is an amenable number.

400476257549 is a deficient number, since it is larger than the sum of its proper divisors (1).

400476257549 is an equidigital number, since it uses as much as digits as its factorization.

400476257549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8467200, while the sum is 53.

The spelling of 400476257549 in words is "four hundred billion, four hundred seventy-six million, two hundred fifty-seven thousand, five hundred forty-nine".