11600561501 has 2 divisors, whose sum is σ = 11600561502. Its totient is φ = 11600561500.

The previous prime is 11600561477. The next prime is 11600561519. The reversal of 11600561501 is 10516500611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11326493476 + 274068025 = 106426^2 + 16555^2 .

It is a cyclic number.

It is not a de Polignac number, because 11600561501 - 2⁶ = 11600561437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11600564501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5800280750 + 5800280751.

It is an arithmetic number, because the mean of its divisors is an integer number (5800280751).

Almost surely, 2^11600561501 is an apocalyptic number.

It is an amenable number.

11600561501 is a deficient number, since it is larger than the sum of its proper divisors (1).

11600561501 is an equidigital number, since it uses as much as digits as its factorization.

11600561501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 26.

The spelling of 11600561501 in words is "eleven billion, six hundred million, five hundred sixty-one thousand, five hundred one".