17955556379 has 2 divisors, whose sum is σ = 17955556380. Its totient is φ = 17955556378.

The previous prime is 17955556361. The next prime is 17955556391. The reversal of 17955556379 is 97365555971.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 17955556379 - 2³² = 13660589083 is a prime.

It is not a weakly prime, because it can be changed into another prime (17955553379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8977778189 + 8977778190.

It is an arithmetic number, because the mean of its divisors is an integer number (8977778190).

Almost surely, 2^17955556379 is an apocalyptic number.

17955556379 is a deficient number, since it is larger than the sum of its proper divisors (1).

17955556379 is an equidigital number, since it uses as much as digits as its factorization.

17955556379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44651250, while the sum is 62.

The spelling of 17955556379 in words is "seventeen billion, nine hundred fifty-five million, five hundred fifty-six thousand, three hundred seventy-nine".