1645050445640 has 64 divisors (see below), whose sum is σ = 4230244569600. Its totient is φ = 564001982208.

The previous prime is 1645050445627. The next prime is 1645050445691. The reversal of 1645050445640 is 465440505461.

It is a junction number, because it is equal to n+sod(n) for n = 1645050445591 and 1645050445600.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16107617 + ... + 16209423.

It is an arithmetic number, because the mean of its divisors is an integer number (66097571400).

Almost surely, 2^{1645050445640} is an apocalyptic number.

1645050445640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1645050445640 is an abundant number, since it is smaller than the sum of its proper divisors (2585194123960).

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

1645050445640 is a wasteful number, since it uses less digits than its factorization.

1645050445640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159534 (or 159530 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 44.

The spelling of 1645050445640 in words is "one trillion, six hundred forty-five billion, fifty million, four hundred forty-five thousand, six hundred forty".