1645074505907 has 8 divisors (see below), whose sum is σ = 1923808060416. Its totient is φ = 1377271679112.

The previous prime is 1645074505897. The next prime is 1645074505931. The reversal of 1645074505907 is 7095054705461.

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

It is a de Polignac number, because none of the positive numbers 2^k-1645074505907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1645074505307) 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, 2732681603 + ... + 2732682204.

It is an arithmetic number, because the mean of its divisors is an integer number (240476007552).

Almost surely, 2^{1645074505907} is an apocalyptic number.

1645074505907 is a deficient number, since it is larger than the sum of its proper divisors (278733554509).

1645074505907 is an equidigital number, since it uses as much as digits as its factorization.

1645074505907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5465363857.

The product of its (nonzero) digits is 5292000, while the sum is 53.

The spelling of 1645074505907 in words is "one trillion, six hundred forty-five billion, seventy-four million, five hundred five thousand, nine hundred seven".