1117655978215 has 32 divisors (see below), whose sum is σ = 1535166581760. Its totient is φ = 765202719744.

The previous prime is 1117655978203. The next prime is 1117655978273. The reversal of 1117655978215 is 5128795567111.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1117655978215 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1117655978215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129819831 + ... + 129828439.

It is an arithmetic number, because the mean of its divisors is an integer number (47973955680).

Almost surely, 2^{1117655978215} is an apocalyptic number.

1117655978215 is a deficient number, since it is larger than the sum of its proper divisors (417510603545).

1117655978215 is an equidigital number, since it uses as much as digits as its factorization.

1117655978215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13951.

The product of its digits is 5292000, while the sum is 58.

The spelling of 1117655978215 in words is "one trillion, one hundred seventeen billion, six hundred fifty-five million, nine hundred seventy-eight thousand, two hundred fifteen".