1645220514 has 32 divisors (see below), whose sum is σ = 3763681920. Its totient is φ = 469665792.

The previous prime is 1645220483. The next prime is 1645220579. The reversal of 1645220514 is 4150225461.

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, 35682 + ... + 67554.

It is an arithmetic number, because the mean of its divisors is an integer number (117615060).

Almost surely, 2^1645220514 is an apocalyptic number.

1645220514 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1645220514 is an abundant number, since it is smaller than the sum of its proper divisors (2118461406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1645220514 is a wasteful number, since it uses less digits than its factorization.

1645220514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33114.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 1645220514 is about 40561.3179519601. The cubic root of 1645220514 is about 1180.5236864455.

Adding to 1645220514 its reverse (4150225461), we get a palindrome (5795445975).

The spelling of 1645220514 in words is "one billion, six hundred forty-five million, two hundred twenty thousand, five hundred fourteen".