500661115515 has 48 divisors (see below), whose sum is σ = 977243544576. Its totient is φ = 234914299200.

The previous prime is 500661115499. The next prime is 500661115519. The reversal of 500661115515 is 515511166005.

It is a happy number.

It is not a de Polignac number, because 500661115515 - 2⁴ = 500661115499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 500661115515.

It is not an unprimeable number, because it can be changed into a prime (500661115519) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16298149 + ... + 16328838.

It is an arithmetic number, because the mean of its divisors is an integer number (20359240512).

Almost surely, 2^500661115515 is an apocalyptic number.

500661115515 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

500661115515 is a deficient number, since it is larger than the sum of its proper divisors (476582429061).

500661115515 is a wasteful number, since it uses less digits than its factorization.

500661115515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32627040 (or 32627037 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 500661115515 in words is "five hundred billion, six hundred sixty-one million, one hundred fifteen thousand, five hundred fifteen".