1625902961873 has 2 divisors, whose sum is σ = 1625902961874. Its totient is φ = 1625902961872.

The previous prime is 1625902961867. The next prime is 1625902961899. The reversal of 1625902961873 is 3781692095261.

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., 1614813187009 + 11089774864 = 1270753^2 + 105308^2 .

It is a cyclic number.

It is not a de Polignac number, because 1625902961873 - 2¹⁰ = 1625902960849 is a prime.

It is not a weakly prime, because it can be changed into another prime (1625902967873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812951480936 + 812951480937.

It is an arithmetic number, because the mean of its divisors is an integer number (812951480937).

Almost surely, 2^{1625902961873} is an apocalyptic number.

It is an amenable number.

1625902961873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625902961873 is an equidigital number, since it uses as much as digits as its factorization.

1625902961873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9797760, while the sum is 59.

The spelling of 1625902961873 in words is "one trillion, six hundred twenty-five billion, nine hundred two million, nine hundred sixty-one thousand, eight hundred seventy-three".