9554661601 has 2 divisors, whose sum is σ = 9554661602. Its totient is φ = 9554661600.

The previous prime is 9554661593. The next prime is 9554661643. The reversal of 9554661601 is 1061664559.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8873451601 + 681210000 = 94199^2 + 26100^2 .

It is a cyclic number.

It is not a de Polignac number, because 9554661601 - 2³ = 9554661593 is a prime.

It is not a weakly prime, because it can be changed into another prime (9554661901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4777330800 + 4777330801.

It is an arithmetic number, because the mean of its divisors is an integer number (4777330801).

Almost surely, 2^9554661601 is an apocalyptic number.

It is an amenable number.

9554661601 is a deficient number, since it is larger than the sum of its proper divisors (1).

9554661601 is an equidigital number, since it uses as much as digits as its factorization.

9554661601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 9554661601 is about 97747.9493442190. The cubic root of 9554661601 is about 2121.9660769760.

The spelling of 9554661601 in words is "nine billion, five hundred fifty-four million, six hundred sixty-one thousand, six hundred one".