1979811015 has 64 divisors (see below), whose sum is σ = 3905212416. Its totient is φ = 834043392.

The previous prime is 1979811011. The next prime is 1979811017. The reversal of 1979811015 is 5101189791.

It is not a de Polignac number, because 1979811015 - 2² = 1979811011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1979811011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1491282 + ... + 1492608.

It is an arithmetic number, because the mean of its divisors is an integer number (61018944).

Almost surely, 2^1979811015 is an apocalyptic number.

1979811015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1979811015 is a deficient number, since it is larger than the sum of its proper divisors (1925401401).

1979811015 is a wasteful number, since it uses less digits than its factorization.

1979811015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448.

The product of its (nonzero) digits is 22680, while the sum is 42.

The square root of 1979811015 is about 44495.0673108829. The cubic root of 1979811015 is about 1255.6672832226.

The spelling of 1979811015 in words is "one billion, nine hundred seventy-nine million, eight hundred eleven thousand, fifteen".