1949618555 has 8 divisors (see below), whose sum is σ = 2339847744. Its totient is φ = 1559491200.

The previous prime is 1949618549. The next prime is 1949618563. The reversal of 1949618555 is 5558169491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1949618555 - 2⁶ = 1949618491 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1949618497 and 1949618506.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 26195 + ... + 67715.

It is an arithmetic number, because the mean of its divisors is an integer number (292480968).

Almost surely, 2^1949618555 is an apocalyptic number.

1949618555 is a deficient number, since it is larger than the sum of its proper divisors (390229189).

1949618555 is an equidigital number, since it uses as much as digits as its factorization.

1949618555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50917.

The product of its digits is 1944000, while the sum is 53.

The square root of 1949618555 is about 44154.4851062720. The cubic root of 1949618555 is about 1249.2515103000.

The spelling of 1949618555 in words is "one billion, nine hundred forty-nine million, six hundred eighteen thousand, five hundred fifty-five".