11620573161 has 4 divisors (see below), whose sum is σ = 15494097552. Its totient is φ = 7747048772.

The previous prime is 11620573121. The next prime is 11620573183. The reversal of 11620573161 is 16137502611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11620573161 - 2¹⁰ = 11620572137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11620573121) 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, 1936762191 + ... + 1936762196.

It is an arithmetic number, because the mean of its divisors is an integer number (3873524388).

Almost surely, 2^11620573161 is an apocalyptic number.

It is an amenable number.

11620573161 is a deficient number, since it is larger than the sum of its proper divisors (3873524391).

11620573161 is an equidigital number, since it uses as much as digits as its factorization.

11620573161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3873524390.

The product of its (nonzero) digits is 7560, while the sum is 33.

The spelling of 11620573161 in words is "eleven billion, six hundred twenty million, five hundred seventy-three thousand, one hundred sixty-one".