1650139385 has 8 divisors (see below), whose sum is σ = 1990428360. Its totient is φ = 1313270784.

The previous prime is 1650139349. The next prime is 1650139397. The reversal of 1650139385 is 5839310561.

It can be written as a sum of positive squares in 4 ways, for example, as 20241001 + 1629898384 = 4499^2 + 40372^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1650139385 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 854030 + ... + 855959.

It is an arithmetic number, because the mean of its divisors is an integer number (248803545).

Almost surely, 2^1650139385 is an apocalyptic number.

It is an amenable number.

1650139385 is a deficient number, since it is larger than the sum of its proper divisors (340288975).

1650139385 is a wasteful number, since it uses less digits than its factorization.

1650139385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1710187.

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 1650139385 is about 40621.9076976944. The cubic root of 1650139385 is about 1181.6990235671.

The spelling of 1650139385 in words is "one billion, six hundred fifty million, one hundred thirty-nine thousand, three hundred eighty-five".