4345820997787 has 4 divisors (see below), whose sum is σ = 4345888359096. Its totient is φ = 4345753636480.

The previous prime is 4345820997781. The next prime is 4345820997809. The reversal of 4345820997787 is 7877990285434.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4345820997787 - 2²⁷ = 4345686780059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4345820997781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33583789 + ... + 33712942.

It is an arithmetic number, because the mean of its divisors is an integer number (1086472089774).

Almost surely, 2^{4345820997787} is an apocalyptic number.

4345820997787 is a deficient number, since it is larger than the sum of its proper divisors (67361309).

4345820997787 is an equidigital number, since it uses as much as digits as its factorization.

4345820997787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67361308.

The product of its (nonzero) digits is 853493760, while the sum is 73.

The spelling of 4345820997787 in words is "four trillion, three hundred forty-five billion, eight hundred twenty million, nine hundred ninety-seven thousand, seven hundred eighty-seven".