1820158955479 has 2 divisors, whose sum is σ = 1820158955480. Its totient is φ = 1820158955478.

The previous prime is 1820158955429. The next prime is 1820158955519. The reversal of 1820158955479 is 9745598510281.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1820158955479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1820158955479.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1820158955429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910079477739 + 910079477740.

It is an arithmetic number, because the mean of its divisors is an integer number (910079477740).

Almost surely, 2^{1820158955479} is an apocalyptic number.

1820158955479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1820158955479 is an equidigital number, since it uses as much as digits as its factorization.

1820158955479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288000, while the sum is 64.

The spelling of 1820158955479 in words is "one trillion, eight hundred twenty billion, one hundred fifty-eight million, nine hundred fifty-five thousand, four hundred seventy-nine".