9554651261 has 2 divisors, whose sum is σ = 9554651262. Its totient is φ = 9554651260.

The previous prime is 9554651233. The next prime is 9554651317. The reversal of 9554651261 is 1621564559.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9542359225 + 12292036 = 97685^2 + 3506^2 .

It is a cyclic number.

It is not a de Polignac number, because 9554651261 - 2²⁶ = 9487542397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9554651221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4777325630 + 4777325631.

It is an arithmetic number, because the mean of its divisors is an integer number (4777325631).

Almost surely, 2^9554651261 is an apocalyptic number.

It is an amenable number.

9554651261 is a deficient number, since it is larger than the sum of its proper divisors (1).

9554651261 is an equidigital number, since it uses as much as digits as its factorization.

9554651261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324000, while the sum is 44.

The square root of 9554651261 is about 97747.8964530695. The cubic root of 9554651261 is about 2121.9653115159.

The spelling of 9554651261 in words is "nine billion, five hundred fifty-four million, six hundred fifty-one thousand, two hundred sixty-one".