311380849061 has 4 divisors (see below), whose sum is σ = 329697369612. Its totient is φ = 293064328512.

The previous prime is 311380849019. The next prime is 311380849097. The reversal of 311380849061 is 160948083113.

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 95871356161 + 215509492900 = 309631^2 + 464230^2 .

It is a cyclic number.

It is not a de Polignac number, because 311380849061 - 2¹⁴ = 311380832677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311383849061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9158260250 + ... + 9158260283.

It is an arithmetic number, because the mean of its divisors is an integer number (82424342403).

Almost surely, 2^311380849061 is an apocalyptic number.

It is an amenable number.

311380849061 is a deficient number, since it is larger than the sum of its proper divisors (18316520551).

311380849061 is a wasteful number, since it uses less digits than its factorization.

311380849061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18316520550.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 311380849061 in words is "three hundred eleven billion, three hundred eighty million, eight hundred forty-nine thousand, sixty-one".