1656041249 has 4 divisors (see below), whose sum is σ = 1657921860. Its totient is φ = 1654160640.

The previous prime is 1656041207. The next prime is 1656041263. The reversal of 1656041249 is 9421406561.

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 508186849 + 1147854400 = 22543^2 + 33880^2 .

It is a cyclic number.

It is not a de Polignac number, because 1656041249 - 2²⁰ = 1654992673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1656641249) 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, 938984 + ... + 940745.

It is an arithmetic number, because the mean of its divisors is an integer number (414480465).

Almost surely, 2^1656041249 is an apocalyptic number.

It is an amenable number.

1656041249 is a deficient number, since it is larger than the sum of its proper divisors (1880611).

1656041249 is an equidigital number, since it uses as much as digits as its factorization.

1656041249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880610.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 1656041249 is about 40694.4867150330. The cubic root of 1656041249 is about 1183.1061630351.

The spelling of 1656041249 in words is "one billion, six hundred fifty-six million, forty-one thousand, two hundred forty-nine".