549888693161 has 2 divisors, whose sum is σ = 549888693162. Its totient is φ = 549888693160.

The previous prime is 549888693157. The next prime is 549888693169. The reversal of 549888693161 is 161396888945.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 430047408400 + 119841284761 = 655780^2 + 346181^2 .

It is a cyclic number.

It is not a de Polignac number, because 549888693161 - 2² = 549888693157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 549888693091 and 549888693100.

It is not a weakly prime, because it can be changed into another prime (549888693169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274944346580 + 274944346581.

It is an arithmetic number, because the mean of its divisors is an integer number (274944346581).

Almost surely, 2^549888693161 is an apocalyptic number.

It is an amenable number.

549888693161 is a deficient number, since it is larger than the sum of its proper divisors (1).

549888693161 is an equidigital number, since it uses as much as digits as its factorization.

549888693161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 89579520, while the sum is 68.

The spelling of 549888693161 in words is "five hundred forty-nine billion, eight hundred eighty-eight million, six hundred ninety-three thousand, one hundred sixty-one".