1650053261 has 4 divisors (see below), whose sum is σ = 1666390524. Its totient is φ = 1633716000.

The previous prime is 1650053257. The next prime is 1650053311. The reversal of 1650053261 is 1623500561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1182672100 + 467381161 = 34390^2 + 21619^2 .

It is a cyclic number.

It is not a de Polignac number, because 1650053261 - 2² = 1650053257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1650053161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8168480 + ... + 8168681.

It is an arithmetic number, because the mean of its divisors is an integer number (416597631).

Almost surely, 2^1650053261 is an apocalyptic number.

It is an amenable number.

1650053261 is a deficient number, since it is larger than the sum of its proper divisors (16337263).

1650053261 is a wasteful number, since it uses less digits than its factorization.

1650053261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16337262.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 1650053261 is about 40620.8476154794. The cubic root of 1650053261 is about 1181.6784648155.

The spelling of 1650053261 in words is "one billion, six hundred fifty million, fifty-three thousand, two hundred sixty-one".