1645166535 has 8 divisors (see below), whose sum is σ = 2632266480. Its totient is φ = 877422144.

The previous prime is 1645166531. The next prime is 1645166581. The reversal of 1645166535 is 5356615461.

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

It is not a de Polignac number, because 1645166535 - 2² = 1645166531 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645166531) 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, 54838870 + ... + 54838899.

It is an arithmetic number, because the mean of its divisors is an integer number (329033310).

Almost surely, 2^1645166535 is an apocalyptic number.

1645166535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1645166535 is a deficient number, since it is larger than the sum of its proper divisors (987099945).

1645166535 is a wasteful number, since it uses less digits than its factorization.

1645166535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109677777.

The product of its digits is 324000, while the sum is 42.

The square root of 1645166535 is about 40560.6525465259. The cubic root of 1645166535 is about 1180.5107754741.

The spelling of 1645166535 in words is "one billion, six hundred forty-five million, one hundred sixty-six thousand, five hundred thirty-five".