1856220136707 has 4 divisors (see below), whose sum is σ = 2474960182280. Its totient is φ = 1237480091136.

The previous prime is 1856220136703. The next prime is 1856220136723. The reversal of 1856220136707 is 7076310226581.

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

It is not a de Polignac number, because 1856220136707 - 2² = 1856220136703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1856220136703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309370022782 + ... + 309370022787.

It is an arithmetic number, because the mean of its divisors is an integer number (618740045570).

Almost surely, 2^{1856220136707} is an apocalyptic number.

1856220136707 is a deficient number, since it is larger than the sum of its proper divisors (618740045573).

1856220136707 is an equidigital number, since it uses as much as digits as its factorization.

1856220136707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618740045572.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 1856220136707 in words is "one trillion, eight hundred fifty-six billion, two hundred twenty million, one hundred thirty-six thousand, seven hundred seven".