1643053461 has 16 divisors (see below), whose sum is σ = 2612557824. Its totient is φ = 898066224.

The previous prime is 1643053441. The next prime is 1643053543. The reversal of 1643053461 is 1643503461.

It is not a de Polignac number, because 1643053461 - 2⁷ = 1643053333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1643053411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1700401 + ... + 1701366.

It is an arithmetic number, because the mean of its divisors is an integer number (163284864).

Almost surely, 2^1643053461 is an apocalyptic number.

It is an amenable number.

1643053461 is a deficient number, since it is larger than the sum of its proper divisors (969504363).

1643053461 is a wasteful number, since it uses less digits than its factorization.

1643053461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3401800.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 1643053461 is about 40534.5958534188. The cubic root of 1643053461 is about 1180.0051376296.

The spelling of 1643053461 in words is "one billion, six hundred forty-three million, fifty-three thousand, four hundred sixty-one".