7845220351545 has 8 divisors (see below), whose sum is σ = 12552352562496. Its totient is φ = 4184117520816.

The previous prime is 7845220351477. The next prime is 7845220351559. The reversal of 7845220351545 is 5451530225487.

It is a happy number.

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

It is not a de Polignac number, because 7845220351545 - 2¹⁰ = 7845220350521 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261507345037 + ... + 261507345066.

It is an arithmetic number, because the mean of its divisors is an integer number (1569044070312).

Almost surely, 2^{7845220351545} is an apocalyptic number.

It is an amenable number.

7845220351545 is a deficient number, since it is larger than the sum of its proper divisors (4707132210951).

7845220351545 is a wasteful number, since it uses less digits than its factorization.

7845220351545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523014690111.

The product of its (nonzero) digits is 6720000, while the sum is 51.

The spelling of 7845220351545 in words is "seven trillion, eight hundred forty-five billion, two hundred twenty million, three hundred fifty-one thousand, five hundred forty-five".