1645614061 has 8 divisors (see below), whose sum is σ = 2025371264. Its totient is φ = 1302024240.

The previous prime is 1645614049. The next prime is 1645614067. The reversal of 1645614061 is 1604165461.

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 1645614061 - 2⁵ = 1645614029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645614067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9041745 + ... + 9041926.

It is an arithmetic number, because the mean of its divisors is an integer number (253171408).

Almost surely, 2^1645614061 is an apocalyptic number.

It is an amenable number.

1645614061 is a deficient number, since it is larger than the sum of its proper divisors (379757203).

1645614061 is a wasteful number, since it uses less digits than its factorization.

1645614061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18083691.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 1645614061 is about 40566.1689218985. The cubic root of 1645614061 is about 1180.6178084820.

The spelling of 1645614061 in words is "one billion, six hundred forty-five million, six hundred fourteen thousand, sixty-one".