1630803745 has 16 divisors (see below), whose sum is σ = 1973224080. Its totient is φ = 1293836544.

The previous prime is 1630803743. The next prime is 1630803787. The reversal of 1630803745 is 5473080361.

It can be written as a sum of positive squares in 8 ways, for example, as 88435216 + 1542368529 = 9404^2 + 39273^2 .

It is a cyclic number.

It is not a de Polignac number, because 1630803745 - 2¹ = 1630803743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1630803743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 479511 + ... + 482899.

It is an arithmetic number, because the mean of its divisors is an integer number (123326505).

Almost surely, 2^1630803745 is an apocalyptic number.

It is an amenable number.

1630803745 is a deficient number, since it is larger than the sum of its proper divisors (342420335).

1630803745 is a wasteful number, since it uses less digits than its factorization.

1630803745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4164.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 1630803745 is about 40383.2111774188. The cubic root of 1630803745 is about 1177.0653267036.

The spelling of 1630803745 in words is "one billion, six hundred thirty million, eight hundred three thousand, seven hundred forty-five".