819461955 has 16 divisors (see below), whose sum is σ = 1411996320. Its totient is φ = 403427328.

The previous prime is 819461939. The next prime is 819461987. The reversal of 819461955 is 559164918.

It is not a de Polignac number, because 819461955 - 2⁴ = 819461939 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2100990 + ... + 2101379.

It is an arithmetic number, because the mean of its divisors is an integer number (88249770).

Almost surely, 2^819461955 is an apocalyptic number.

819461955 is a deficient number, since it is larger than the sum of its proper divisors (592534365).

819461955 is a wasteful number, since it uses less digits than its factorization.

819461955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4202390.

The product of its digits is 388800, while the sum is 48.

The square root of 819461955 is about 28626.2459117503. The cubic root of 819461955 is about 935.7854001132.

The spelling of 819461955 in words is "eight hundred nineteen million, four hundred sixty-one thousand, nine hundred fifty-five".