11601156616501 has 4 divisors (see below), whose sum is σ = 11601911276812. Its totient is φ = 11600401956192.

The previous prime is 11601156616337. The next prime is 11601156616537. The reversal of 11601156616501 is 10561665110611.

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 76285887601 + 11524870728900 = 276199^2 + 3394830^2 .

It is a cyclic number.

It is not a de Polignac number, because 11601156616501 - 2¹⁵ = 11601156583733 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 (11601156616561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377307096 + ... + 377337841.

It is an arithmetic number, because the mean of its divisors is an integer number (2900477819203).

Almost surely, 2^{11601156616501} is an apocalyptic number.

It is an amenable number.

11601156616501 is a deficient number, since it is larger than the sum of its proper divisors (754660311).

11601156616501 is an equidigital number, since it uses as much as digits as its factorization.

11601156616501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754660310.

The product of its (nonzero) digits is 32400, while the sum is 40.

The spelling of 11601156616501 in words is "eleven trillion, six hundred one billion, one hundred fifty-six million, six hundred sixteen thousand, five hundred one".