611000000001 has 6 divisors (see below), whose sum is σ = 882555555570. Its totient is φ = 407333333328.

The previous prime is 610999999999. The next prime is 611000000027. The reversal of 611000000001 is 100000000116.

It can be written as a sum of positive squares in only one way, i.e., 607426949376 + 3573050625 = 779376^2 + 59775^2 .

It is not a de Polignac number, because 611000000001 - 2¹ = 610999999999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 67888888889 = 611000000001 / (6 + 1 + 1 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 1).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 611000000001.

It is not an unprimeable number, because it can be changed into a prime (611000005001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33944444436 + ... + 33944444453.

It is an arithmetic number, because the mean of its divisors is an integer number (147092592595).

Almost surely, 2^611000000001 is an apocalyptic number.

It is an amenable number.

611000000001 is a deficient number, since it is larger than the sum of its proper divisors (271555555569).

611000000001 is a wasteful number, since it uses less digits than its factorization.

611000000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67888888895 (or 67888888892 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

Adding to 611000000001 its reverse (100000000116), we get a palindrome (711000000117).

The spelling of 611000000001 in words is "six hundred eleven billion, one", and thus it is an aban number.