1620236748925 has 12 divisors (see below), whose sum is σ = 2019292019316. Its totient is φ = 1289609753600.

The previous prime is 1620236748883. The next prime is 1620236748937. The reversal of 1620236748925 is 5298476320261.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 29866061124 + 1590370687801 = 172818^2 + 1261099^2 .

It is not a de Polignac number, because 1620236748925 - 2¹⁹ = 1620236224637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 164486116 + ... + 164495965.

It is an arithmetic number, because the mean of its divisors is an integer number (168274334943).

It is a 1-persistent number, because it is pandigital, but 2⋅1620236748925 = 3240473497850 is not.

Almost surely, 2^{1620236748925} is an apocalyptic number.

It is an amenable number.

1620236748925 is a deficient number, since it is larger than the sum of its proper divisors (399055270391).

1620236748925 is a wasteful number, since it uses less digits than its factorization.

1620236748925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328982288 (or 328982283 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 1620236748925 in words is "one trillion, six hundred twenty billion, two hundred thirty-six million, seven hundred forty-eight thousand, nine hundred twenty-five".