1798778971 has 16 divisors (see below), whose sum is σ = 2007659520. Its totient is φ = 1597583680.

The previous prime is 1798778957. The next prime is 1798779007.

1798778971 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1798778971 - 2¹¹ = 1798776923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1798778941) 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 15 ways as a sum of consecutive naturals, for example, 316170 + ... + 321808.

It is an arithmetic number, because the mean of its divisors is an integer number (125478720).

Almost surely, 2^1798778971 is an apocalyptic number.

1798778971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1798778971 is a deficient number, since it is larger than the sum of its proper divisors (208880549).

1798778971 is a wasteful number, since it uses less digits than its factorization.

1798778971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6314.

The product of its digits is 12446784, while the sum is 64.

The square root of 1798778971 is about 42412.0144652432. The cubic root of 1798778971 is about 1216.1652796733.

The spelling of 1798778971 in words is "one billion, seven hundred ninety-eight million, seven hundred seventy-eight thousand, nine hundred seventy-one".