1156606554997 has 4 divisors (see below), whose sum is σ = 1156635845356. Its totient is φ = 1156577264640.

The previous prime is 1156606554991. The next prime is 1156606555043. The reversal of 1156606554997 is 7994556066511.

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 374512176676 + 782094378321 = 611974^2 + 884361^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156606554997 - 2¹¹ = 1156606552949 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 (1156606554991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14585868 + ... + 14664949.

It is an arithmetic number, because the mean of its divisors is an integer number (289158961339).

Almost surely, 2^{1156606554997} is an apocalyptic number.

It is an amenable number.

1156606554997 is a deficient number, since it is larger than the sum of its proper divisors (29290359).

1156606554997 is an equidigital number, since it uses as much as digits as its factorization.

1156606554997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29290358.

The product of its (nonzero) digits is 61236000, while the sum is 64.

The spelling of 1156606554997 in words is "one trillion, one hundred fifty-six billion, six hundred six million, five hundred fifty-four thousand, nine hundred ninety-seven".