1852408561 has 2 divisors, whose sum is σ = 1852408562. Its totient is φ = 1852408560.

The previous prime is 1852408541. The next prime is 1852408583. The reversal of 1852408561 is 1658042581.

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., 1761396961 + 91011600 = 41969^2 + 9540^2 .

It is a cyclic number.

It is not a de Polignac number, because 1852408561 - 2⁷ = 1852408433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1852408541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 926204280 + 926204281.

It is an arithmetic number, because the mean of its divisors is an integer number (926204281).

Almost surely, 2^1852408561 is an apocalyptic number.

It is an amenable number.

1852408561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1852408561 is an equidigital number, since it uses as much as digits as its factorization.

1852408561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76800, while the sum is 40.

The square root of 1852408561 is about 43039.6161809094. The cubic root of 1852408561 is about 1228.1335432599.

The spelling of 1852408561 in words is "one billion, eight hundred fifty-two million, four hundred eight thousand, five hundred sixty-one".