61543504462663 has 2 divisors, whose sum is σ = 61543504462664. Its totient is φ = 61543504462662.

The previous prime is 61543504462579. The next prime is 61543504462669. The reversal of 61543504462663 is 36626440534516.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61543504462663 is a prime.

It is a super-2 number, since 2×61543504462663² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61543504462669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30771752231331 + 30771752231332.

It is an arithmetic number, because the mean of its divisors is an integer number (30771752231332).

Almost surely, 2^{61543504462663} is an apocalyptic number.

61543504462663 is a deficient number, since it is larger than the sum of its proper divisors (1).

61543504462663 is an equidigital number, since it uses as much as digits as its factorization.

61543504462663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37324800, while the sum is 55.

The spelling of 61543504462663 in words is "sixty-one trillion, five hundred forty-three billion, five hundred four million, four hundred sixty-two thousand, six hundred sixty-three".