42991777181515 has 16 divisors (see below), whose sum is σ = 51622188377760. Its totient is φ = 34372052709120.

The previous prime is 42991777181417. The next prime is 42991777181569. The reversal of 42991777181515 is 51518177719924.

It is not a de Polignac number, because 42991777181515 - 2³⁵ = 42957417443147 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290122672 + ... + 290270818.

It is an arithmetic number, because the mean of its divisors is an integer number (3226386773610).

Almost surely, 2^{42991777181515} is an apocalyptic number.

42991777181515 is a deficient number, since it is larger than the sum of its proper divisors (8630411196245).

42991777181515 is a wasteful number, since it uses less digits than its factorization.

42991777181515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183822.

The product of its digits is 44452800, while the sum is 67.

The spelling of 42991777181515 in words is "forty-two trillion, nine hundred ninety-one billion, seven hundred seventy-seven million, one hundred eighty-one thousand, five hundred fifteen".