1645125053 has 8 divisors (see below), whose sum is σ = 1932734496. Its totient is φ = 1380524400.

The previous prime is 1645125049. The next prime is 1645125101. The reversal of 1645125053 is 3505215461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1645125053 - 2² = 1645125049 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645125023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5752043 + ... + 5752328.

It is an arithmetic number, because the mean of its divisors is an integer number (241591812).

Almost surely, 2^1645125053 is an apocalyptic number.

1645125053 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1645125053 is a deficient number, since it is larger than the sum of its proper divisors (287609443).

1645125053 is a wasteful number, since it uses less digits than its factorization.

1645125053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11504395.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 1645125053 is about 40560.1411856517. The cubic root of 1645125053 is about 1180.5008534068.

The spelling of 1645125053 in words is "one billion, six hundred forty-five million, one hundred twenty-five thousand, fifty-three".