1650455897 has 4 divisors (see below), whose sum is σ = 1747541556. Its totient is φ = 1553370240.

The previous prime is 1650455893. The next prime is 1650455923. The reversal of 1650455897 is 7985540561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7985540561 = 61 ⋅130910501.

It can be written as a sum of positive squares in 2 ways, for example, as 1214940736 + 435515161 = 34856^2 + 20869^2 .

It is not a de Polignac number, because 1650455897 - 2² = 1650455893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1650455893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48542804 + ... + 48542837.

It is an arithmetic number, because the mean of its divisors is an integer number (436885389).

Almost surely, 2^1650455897 is an apocalyptic number.

1650455897 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1650455897 is a deficient number, since it is larger than the sum of its proper divisors (97085659).

1650455897 is an equidigital number, since it uses as much as digits as its factorization.

1650455897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97085658.

The product of its (nonzero) digits is 1512000, while the sum is 50.

The square root of 1650455897 is about 40625.8033397495. The cubic root of 1650455897 is about 1181.7745723386.

The spelling of 1650455897 in words is "one billion, six hundred fifty million, four hundred fifty-five thousand, eight hundred ninety-seven".