1650644125 has 24 divisors (see below), whose sum is σ = 2230683624. Its totient is φ = 1218921600.

The previous prime is 1650644123. The next prime is 1650644143. The reversal of 1650644125 is 5214460561.

It can be written as a sum of positive squares in 12 ways, for example, as 1507147684 + 143496441 = 38822^2 + 11979^2 .

It is not a de Polignac number, because 1650644125 - 2¹ = 1650644123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1650644123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17944 + ... + 60193.

It is an arithmetic number, because the mean of its divisors is an integer number (92945151).

Almost surely, 2^1650644125 is an apocalyptic number.

It is an amenable number.

1650644125 is a deficient number, since it is larger than the sum of its proper divisors (580039499).

1650644125 is an equidigital number, since it uses as much as digits as its factorization.

1650644125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78178 (or 78155 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 1650644125 is about 40628.1198802012. The cubic root of 1650644125 is about 1181.8194962107.

The spelling of 1650644125 in words is "one billion, six hundred fifty million, six hundred forty-four thousand, one hundred twenty-five".