1115605015661 has 8 divisors (see below), whose sum is σ = 1120531446144. Its totient is φ = 1110688839360.

The previous prime is 1115605015621. The next prime is 1115605015673. The reversal of 1115605015661 is 1665105065111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1115605015661 - 2¹⁴ = 1115604999277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115605015621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2345435 + ... + 2780696.

It is an arithmetic number, because the mean of its divisors is an integer number (140066430768).

Almost surely, 2^{1115605015661} is an apocalyptic number.

It is an amenable number.

1115605015661 is a deficient number, since it is larger than the sum of its proper divisors (4926430483).

1115605015661 is an equidigital number, since it uses as much as digits as its factorization.

1115605015661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5127091.

The product of its (nonzero) digits is 27000, while the sum is 38.

The spelling of 1115605015661 in words is "one trillion, one hundred fifteen billion, six hundred five million, fifteen thousand, six hundred sixty-one".