1645155241 has 8 divisors (see below), whose sum is σ = 1684609920. Its totient is φ = 1605886128.

The previous prime is 1645155227. The next prime is 1645155257. The reversal of 1645155241 is 1425515461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1645155241 - 2¹⁵ = 1645122473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1645155197 and 1645155206.

It is not an unprimeable number, because it can be changed into a prime (1645155221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28366 + ... + 63991.

It is an arithmetic number, because the mean of its divisors is an integer number (210576240).

Almost surely, 2^1645155241 is an apocalyptic number.

It is an amenable number.

1645155241 is a deficient number, since it is larger than the sum of its proper divisors (39454679).

1645155241 is an equidigital number, since it uses as much as digits as its factorization.

1645155241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92783.

The product of its digits is 24000, while the sum is 34.

The square root of 1645155241 is about 40560.5133226886. The cubic root of 1645155241 is about 1180.5080740821.

The spelling of 1645155241 in words is "one billion, six hundred forty-five million, one hundred fifty-five thousand, two hundred forty-one".