1965625801 has 2 divisors, whose sum is σ = 1965625802. Its totient is φ = 1965625800.

The previous prime is 1965625763. The next prime is 1965625811. The reversal of 1965625801 is 1085265691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1879135801 + 86490000 = 43349^2 + 9300^2 .

It is a cyclic number.

It is not a de Polignac number, because 1965625801 - 2¹³ = 1965617609 is a prime.

It is not a weakly prime, because it can be changed into another prime (1965625811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982812900 + 982812901.

It is an arithmetic number, because the mean of its divisors is an integer number (982812901).

Almost surely, 2^1965625801 is an apocalyptic number.

It is an amenable number.

1965625801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1965625801 is an equidigital number, since it uses as much as digits as its factorization.

1965625801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 43.

The square root of 1965625801 is about 44335.3786608392. The cubic root of 1965625801 is about 1252.6611680738.

The spelling of 1965625801 in words is "one billion, nine hundred sixty-five million, six hundred twenty-five thousand, eight hundred one".