1851028061 has 2 divisors, whose sum is σ = 1851028062. Its totient is φ = 1851028060.

The previous prime is 1851028057. The next prime is 1851028079. The reversal of 1851028061 is 1608201581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1848484036 + 2544025 = 42994^2 + 1595^2 .

It is a cyclic number.

It is not a de Polignac number, because 1851028061 - 2² = 1851028057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1851028031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 925514030 + 925514031.

It is an arithmetic number, because the mean of its divisors is an integer number (925514031).

Almost surely, 2^1851028061 is an apocalyptic number.

It is an amenable number.

1851028061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1851028061 is an equidigital number, since it uses as much as digits as its factorization.

1851028061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 32.

The square root of 1851028061 is about 43023.5756417339. The cubic root of 1851028061 is about 1227.8283802523.

The spelling of 1851028061 in words is "one billion, eight hundred fifty-one million, twenty-eight thousand, sixty-one".