69538963561 has 2 divisors, whose sum is σ = 69538963562. Its totient is φ = 69538963560.

The previous prime is 69538963523. The next prime is 69538963583. The reversal of 69538963561 is 16536983596.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69284241961 + 254721600 = 263219^2 + 15960^2 .

It is a cyclic number.

It is not a de Polignac number, because 69538963561 - 2¹⁹ = 69538439273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 69538963561.

It is not a weakly prime, because it can be changed into another prime (69538963511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34769481780 + 34769481781.

It is an arithmetic number, because the mean of its divisors is an integer number (34769481781).

Almost surely, 2^69538963561 is an apocalyptic number.

It is an amenable number.

69538963561 is a deficient number, since it is larger than the sum of its proper divisors (1).

69538963561 is an equidigital number, since it uses as much as digits as its factorization.

69538963561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31492800, while the sum is 61.

The spelling of 69538963561 in words is "sixty-nine billion, five hundred thirty-eight million, nine hundred sixty-three thousand, five hundred sixty-one".