201641616045 has 12 divisors (see below), whose sum is σ = 349512134556. Its totient is φ = 107542195200.

The previous prime is 201641616023. The next prime is 201641616073. The reversal of 201641616045 is 540616146102.

201641616045 is a `hidden beast` number, since 2 + 0 + 1 + 6 + 41 + 6 + 1 + 604 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 75749351076 + 125892264969 = 275226^2 + 354813^2 .

It is not a de Polignac number, because 201641616045 - 2¹⁷ = 201641484973 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2240462356 + ... + 2240462445.

It is an arithmetic number, because the mean of its divisors is an integer number (29126011213).

Almost surely, 2^201641616045 is an apocalyptic number.

It is an amenable number.

201641616045 is a deficient number, since it is larger than the sum of its proper divisors (147870518511).

201641616045 is a wasteful number, since it uses less digits than its factorization.

201641616045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4480924812 (or 4480924809 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 201641616045 in words is "two hundred one billion, six hundred forty-one million, six hundred sixteen thousand, forty-five".