1645056126 has 48 divisors (see below), whose sum is σ = 4156620000. Its totient is φ = 470014272.

The previous prime is 1645056121. The next prime is 1645056143. The reversal of 1645056126 is 6216505461.

1645056126 is a `hidden beast` number, since 1 + 645 + 0 + 5 + 6 + 1 + 2 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645056121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127051 + ... + 139398.

It is an arithmetic number, because the mean of its divisors is an integer number (86596250).

Almost surely, 2^1645056126 is an apocalyptic number.

1645056126 is an abundant number, since it is smaller than the sum of its proper divisors (2511563874).

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

1645056126 is a wasteful number, since it uses less digits than its factorization.

1645056126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266478 (or 266461 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1645056126 is about 40559.2914878946. The cubic root of 1645056126 is about 1180.4843664091.

The spelling of 1645056126 in words is "one billion, six hundred forty-five million, fifty-six thousand, one hundred twenty-six".