69976409561 has 2 divisors, whose sum is σ = 69976409562. Its totient is φ = 69976409560.

The previous prime is 69976409557. The next prime is 69976409563. The reversal of 69976409561 is 16590467996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53807761225 + 16168648336 = 231965^2 + 127156^2 .

It is a cyclic number.

It is not a de Polignac number, because 69976409561 - 2² = 69976409557 is a prime.

Together with 69976409563, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 69976409494 and 69976409503.

It is not a weakly prime, because it can be changed into another prime (69976409563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34988204780 + 34988204781.

It is an arithmetic number, because the mean of its divisors is an integer number (34988204781).

Almost surely, 2^69976409561 is an apocalyptic number.

It is an amenable number.

69976409561 is a deficient number, since it is larger than the sum of its proper divisors (1).

69976409561 is an equidigital number, since it uses as much as digits as its factorization.

69976409561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22044960, while the sum is 62.

The spelling of 69976409561 in words is "sixty-nine billion, nine hundred seventy-six million, four hundred nine thousand, five hundred sixty-one".