511789987115 has 12 divisors (see below), whose sum is σ = 675055223472. Its totient is φ = 372210899280.

The previous prime is 511789987073. The next prime is 511789987141.

511789987115 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 511789987115 - 2¹⁰ = 511789986091 is a prime.

It is a super-2 number, since 2×511789987115² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 422966327 + ... + 422967536.

It is an arithmetic number, because the mean of its divisors is an integer number (56254601956).

Almost surely, 2^511789987115 is an apocalyptic number.

511789987115 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

511789987115 is a deficient number, since it is larger than the sum of its proper divisors (163265236357).

511789987115 is a wasteful number, since it uses less digits than its factorization.

511789987115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845933890 (or 845933879 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 62.

The spelling of 511789987115 in words is "five hundred eleven billion, seven hundred eighty-nine million, nine hundred eighty-seven thousand, one hundred fifteen".