1653466649 has 4 divisors (see below), whose sum is σ = 1656715620. Its totient is φ = 1650217680.

The previous prime is 1653466637. The next prime is 1653466667. The reversal of 1653466649 is 9466643561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9466643561 = 3701 ⋅2557861.

It can be written as a sum of positive squares in 2 ways, for example, as 897601600 + 755865049 = 29960^2 + 27493^2 .

It is a cyclic number.

It is not a de Polignac number, because 1653466649 - 2¹² = 1653462553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1653466597 and 1653466606.

It is not an unprimeable number, because it can be changed into a prime (1653466609) 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, 1623722 + ... + 1624739.

It is an arithmetic number, because the mean of its divisors is an integer number (414178905).

Almost surely, 2^1653466649 is an apocalyptic number.

It is an amenable number.

1653466649 is a deficient number, since it is larger than the sum of its proper divisors (3248971).

1653466649 is an equidigital number, since it uses as much as digits as its factorization.

1653466649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3248970.

The product of its digits is 2799360, while the sum is 50.

The square root of 1653466649 is about 40662.8411329066. The cubic root of 1653466649 is about 1182.4927312508.

The spelling of 1653466649 in words is "one billion, six hundred fifty-three million, four hundred sixty-six thousand, six hundred forty-nine".