400526446640497 has 2 divisors, whose sum is σ = 400526446640498. Its totient is φ = 400526446640496.

The previous prime is 400526446640491. The next prime is 400526446640591. The reversal of 400526446640497 is 794046644625004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 399217822750096 + 1308623890401 = 19980436^2 + 1143951^2 .

It is a cyclic number.

It is not a de Polignac number, because 400526446640497 - 2²³ = 400526438251889 is a prime.

It is not a weakly prime, because it can be changed into another prime (400526446640491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200263223320248 + 200263223320249.

It is an arithmetic number, because the mean of its divisors is an integer number (200263223320249).

Almost surely, 2^{400526446640497} is an apocalyptic number.

It is an amenable number.

400526446640497 is a deficient number, since it is larger than the sum of its proper divisors (1).

400526446640497 is an equidigital number, since it uses as much as digits as its factorization.

400526446640497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139345920, while the sum is 61.

The spelling of 400526446640497 in words is "four hundred trillion, five hundred twenty-six billion, four hundred forty-six million, six hundred forty thousand, four hundred ninety-seven".