1669052385 has 320 divisors, whose sum is σ = 4215214080. Its totient is φ = 609016320.

The previous prime is 1669052383. The next prime is 1669052387. The reversal of 1669052385 is 5832509661.

It is an interprime number because it is at equal distance from previous prime (1669052383) and next prime (1669052387).

It is not a de Polignac number, because 1669052385 - 2¹ = 1669052383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1669052385.

It is not an unprimeable number, because it can be changed into a prime (1669052383) by changing a digit.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 9324226 + ... + 9324404.

It is an arithmetic number, because the mean of its divisors is an integer number (13172544).

It is a vampire number, since it can be written as 29601 ⋅ 56385 (with its own digits).

Almost surely, 2^1669052385 is an apocalyptic number.

1669052385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1669052385 is an abundant number, since it is smaller than the sum of its proper divisors (2546161695).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1669052385 is a wasteful number, since it uses less digits than its factorization.

1669052385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 1669052385 is about 40854.0375605643. The cubic root of 1669052385 is about 1186.1965481542.

The spelling of 1669052385 in words is "one billion, six hundred sixty-nine million, fifty-two thousand, three hundred eighty-five".