11952561277 has 4 divisors (see below), whose sum is σ = 11952780700. Its totient is φ = 11952341856.

The previous prime is 11952561259. The next prime is 11952561281. The reversal of 11952561277 is 77216525911.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6422259321 + 5530301956 = 80139^2 + 74366^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11952561277 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 (11952561077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41113 + ... + 159985.

It is an arithmetic number, because the mean of its divisors is an integer number (2988195175).

Almost surely, 2^11952561277 is an apocalyptic number.

It is an amenable number.

11952561277 is a deficient number, since it is larger than the sum of its proper divisors (219423).

11952561277 is a wasteful number, since it uses less digits than its factorization.

11952561277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219422.

The product of its digits is 264600, while the sum is 46.

The spelling of 11952561277 in words is "eleven billion, nine hundred fifty-two million, five hundred sixty-one thousand, two hundred seventy-seven".