2011943308658 has 4 divisors (see below), whose sum is σ = 3017914962990. Its totient is φ = 1005971654328.

The previous prime is 2011943308619. The next prime is 2011943308663. The reversal of 2011943308658 is 8568033491102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1128262466809 + 883680841849 = 1062197^2 + 940043^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502985827163 + ... + 502985827166.

Almost surely, 2^{2011943308658} is an apocalyptic number.

2011943308658 is a deficient number, since it is larger than the sum of its proper divisors (1005971654332).

2011943308658 is a wasteful number, since it uses less digits than its factorization.

2011943308658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005971654331.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 2011943308658 in words is "two trillion, eleven billion, nine hundred forty-three million, three hundred eight thousand, six hundred fifty-eight".