1653555849 has 32 divisors (see below), whose sum is σ = 2450580480. Its totient is φ = 983371200.

The previous prime is 1653555803. The next prime is 1653555857. The reversal of 1653555849 is 9485553561.

It is not a de Polignac number, because 1653555849 - 2¹⁶ = 1653490313 is a prime.

It is a super-2 number, since 2×1653555849² = 5468493891524221602, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1653555149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 530307 + ... + 533415.

It is an arithmetic number, because the mean of its divisors is an integer number (76580640).

Almost surely, 2^1653555849 is an apocalyptic number.

It is an amenable number.

1653555849 is a deficient number, since it is larger than the sum of its proper divisors (797024631).

1653555849 is a wasteful number, since it uses less digits than its factorization.

1653555849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3421.

The product of its digits is 3240000, while the sum is 51.

The square root of 1653555849 is about 40663.9379426046. The cubic root of 1653555849 is about 1182.5139949505.

The spelling of 1653555849 in words is "one billion, six hundred fifty-three million, five hundred fifty-five thousand, eight hundred forty-nine".