1650394945 has 8 divisors (see below), whose sum is σ = 1998000936. Its totient is φ = 1308631296.

The previous prime is 1650394943. The next prime is 1650394961. The reversal of 1650394945 is 5494930561.

It can be written as a sum of positive squares in 4 ways, for example, as 141538609 + 1508856336 = 11897^2 + 38844^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1650394945 - 2¹ = 1650394943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1650394895 and 1650394904.

It is not an unprimeable number, because it can be changed into a prime (1650394943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1459962 + ... + 1461091.

It is an arithmetic number, because the mean of its divisors is an integer number (249750117).

Almost surely, 2^1650394945 is an apocalyptic number.

It is an amenable number.

1650394945 is a deficient number, since it is larger than the sum of its proper divisors (347605991).

1650394945 is a wasteful number, since it uses less digits than its factorization.

1650394945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2921171.

The product of its (nonzero) digits is 583200, while the sum is 46.

The square root of 1650394945 is about 40625.0531691960. The cubic root of 1650394945 is about 1181.7600243561.

The spelling of 1650394945 in words is "one billion, six hundred fifty million, three hundred ninety-four thousand, nine hundred forty-five".