1645035656 has 48 divisors (see below), whose sum is σ = 3568815600. Its totient is φ = 708380640.

The previous prime is 1645035629. The next prime is 1645035659. The reversal of 1645035656 is 6565305461.

It is a super-2 number, since 2×1645035656² = 5412284619022700672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1645035659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26330 + ... + 63113.

It is an arithmetic number, because the mean of its divisors is an integer number (74350325).

Almost surely, 2^1645035656 is an apocalyptic number.

It is an amenable number.

1645035656 is an abundant number, since it is smaller than the sum of its proper divisors (1923779944).

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

1645035656 is a wasteful number, since it uses less digits than its factorization.

1645035656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89490 (or 89475 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 41.

The square root of 1645035656 is about 40559.0391404925. The cubic root of 1645035656 is about 1180.4794699976.

The spelling of 1645035656 in words is "one billion, six hundred forty-five million, thirty-five thousand, six hundred fifty-six".