1855455966979 has 4 divisors (see below), whose sum is σ = 1905603425584. Its totient is φ = 1805308508376.

The previous prime is 1855455966977. The next prime is 1855455967063. The reversal of 1855455966979 is 9796695545581.

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

It is not a de Polignac number, because 1855455966979 - 2¹ = 1855455966977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1855455966899 and 1855455966908.

It is not an unprimeable number, because it can be changed into a prime (1855455966977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25073729247 + ... + 25073729320.

It is an arithmetic number, because the mean of its divisors is an integer number (476400856396).

Almost surely, 2^{1855455966979} is an apocalyptic number.

1855455966979 is a deficient number, since it is larger than the sum of its proper divisors (50147458605).

1855455966979 is an equidigital number, since it uses as much as digits as its factorization.

1855455966979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50147458604.

The product of its digits is 3674160000, while the sum is 79.

The spelling of 1855455966979 in words is "one trillion, eight hundred fifty-five billion, four hundred fifty-five million, nine hundred sixty-six thousand, nine hundred seventy-nine".