6115610661505 has 4 divisors (see below), whose sum is σ = 7338732793812. Its totient is φ = 4892488529200.

The previous prime is 6115610661499. The next prime is 6115610661539. The reversal of 6115610661505 is 5051660165116.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4790425199616 + 1325185461889 = 2188704^2 + 1151167^2 .

It is not a de Polignac number, because 6115610661505 - 2³⁹ = 5565854847617 is a prime.

It is a super-2 number, since 2×6115610661505² (a number of 26 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 3 ways as a sum of consecutive naturals, for example, 611561066146 + ... + 611561066155.

It is an arithmetic number, because the mean of its divisors is an integer number (1834683198453).

Almost surely, 2^{6115610661505} is an apocalyptic number.

It is an amenable number.

6115610661505 is a deficient number, since it is larger than the sum of its proper divisors (1223122132307).

6115610661505 is a wasteful number, since it uses less digits than its factorization.

6115610661505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223122132306.

The product of its (nonzero) digits is 162000, while the sum is 43.

The spelling of 6115610661505 in words is "six trillion, one hundred fifteen billion, six hundred ten million, six hundred sixty-one thousand, five hundred five".