11651112061 has 4 divisors (see below), whose sum is σ = 12336471612. Its totient is φ = 10965752512.

The previous prime is 11651112041. The next prime is 11651112089. The reversal of 11651112061 is 16021115611.

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 10289059225 + 1362052836 = 101435^2 + 36906^2 .

It is a cyclic number.

It is not a de Polignac number, because 11651112061 - 2²³ = 11642723453 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 (11651112041) 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, 342679750 + ... + 342679783.

It is an arithmetic number, because the mean of its divisors is an integer number (3084117903).

Almost surely, 2^11651112061 is an apocalyptic number.

It is an amenable number.

11651112061 is a deficient number, since it is larger than the sum of its proper divisors (685359551).

11651112061 is an equidigital number, since it uses as much as digits as its factorization.

11651112061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685359550.

The product of its (nonzero) digits is 360, while the sum is 25.

Adding to 11651112061 its reverse (16021115611), we get a palindrome (27672227672).

The spelling of 11651112061 in words is "eleven billion, six hundred fifty-one million, one hundred twelve thousand, sixty-one".