1645875441199 has 16 divisors (see below), whose sum is σ = 1890352644480. Its totient is φ = 1417236276960.

The previous prime is 1645875441179. The next prime is 1645875441241. The reversal of 1645875441199 is 9911445785461.

It is a cyclic number.

It is not a de Polignac number, because 1645875441199 - 2²³ = 1645867052591 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1645875441199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645875441169) 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, 394957 + ... + 1856809.

It is an arithmetic number, because the mean of its divisors is an integer number (118147040280).

Almost surely, 2^{1645875441199} is an apocalyptic number.

1645875441199 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1645875441199 is a deficient number, since it is larger than the sum of its proper divisors (244477203281).

1645875441199 is a wasteful number, since it uses less digits than its factorization.

1645875441199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467270.

The product of its digits is 43545600, while the sum is 64.

The spelling of 1645875441199 in words is "one trillion, six hundred forty-five billion, eight hundred seventy-five million, four hundred forty-one thousand, one hundred ninety-nine".