1550610161 has 2 divisors, whose sum is σ = 1550610162. Its totient is φ = 1550610160.

The previous prime is 1550610157. The next prime is 1550610169. The reversal of 1550610161 is 1610160551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1424609536 + 126000625 = 37744^2 + 11225^2 .

It is a cyclic number.

It is not a de Polignac number, because 1550610161 - 2² = 1550610157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1550610161.

It is not a weakly prime, because it can be changed into another prime (1550610169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775305080 + 775305081.

It is an arithmetic number, because the mean of its divisors is an integer number (775305081).

Almost surely, 2^1550610161 is an apocalyptic number.

It is an amenable number.

1550610161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550610161 is an equidigital number, since it uses as much as digits as its factorization.

1550610161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 1550610161 is about 39377.7876600502. The cubic root of 1550610161 is about 1157.4463645423.

The spelling of 1550610161 in words is "one billion, five hundred fifty million, six hundred ten thousand, one hundred sixty-one".