63544400477 has 2 divisors, whose sum is σ = 63544400478. Its totient is φ = 63544400476.

The previous prime is 63544400431. The next prime is 63544400497. The reversal of 63544400477 is 77400444536.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62967872356 + 576528121 = 250934^2 + 24011^2 .

It is a cyclic number.

It is not a de Polignac number, because 63544400477 - 2¹⁴ = 63544384093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63544400497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31772200238 + 31772200239.

It is an arithmetic number, because the mean of its divisors is an integer number (31772200239).

Almost surely, 2^63544400477 is an apocalyptic number.

It is an amenable number.

63544400477 is a deficient number, since it is larger than the sum of its proper divisors (1).

63544400477 is an equidigital number, since it uses as much as digits as its factorization.

63544400477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1128960, while the sum is 44.

The spelling of 63544400477 in words is "sixty-three billion, five hundred forty-four million, four hundred thousand, four hundred seventy-seven".