1645145315 has 16 divisors (see below), whose sum is σ = 2154443616. Its totient is φ = 1196025600.

The previous prime is 1645145309. The next prime is 1645145323. The reversal of 1645145315 is 5135415461.

It is not a de Polignac number, because 1645145315 - 2¹² = 1645141219 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250919 + ... + 257391.

It is an arithmetic number, because the mean of its divisors is an integer number (134652726).

Almost surely, 2^1645145315 is an apocalyptic number.

1645145315 is a deficient number, since it is larger than the sum of its proper divisors (509298301).

1645145315 is a wasteful number, since it uses less digits than its factorization.

1645145315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11110.

The product of its digits is 36000, while the sum is 35.

The square root of 1645145315 is about 40560.3909621197. The cubic root of 1645145315 is about 1180.5056998894.

The spelling of 1645145315 in words is "one billion, six hundred forty-five million, one hundred forty-five thousand, three hundred fifteen".