1645251122 has 16 divisors (see below), whose sum is σ = 2572922880. Its totient is φ = 788332272.

The previous prime is 1645251119. The next prime is 1645251133. The reversal of 1645251122 is 2211525461.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175922 + ... + 185037.

It is an arithmetic number, because the mean of its divisors is an integer number (160807680).

Almost surely, 2^1645251122 is an apocalyptic number.

1645251122 is a deficient number, since it is larger than the sum of its proper divisors (927671758).

1645251122 is a wasteful number, since it uses less digits than its factorization.

1645251122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361057.

The product of its digits is 4800, while the sum is 29.

The square root of 1645251122 is about 40561.6952554994. The cubic root of 1645251122 is about 1180.5310072970.

Adding to 1645251122 its reverse (2211525461), we get a palindrome (3856776583).

The spelling of 1645251122 in words is "one billion, six hundred forty-five million, two hundred fifty-one thousand, one hundred twenty-two".