611111000000 has 98 divisors (see below), whose sum is σ = 1515824815944. Its totient is φ = 244444000000.

The previous prime is 611110999991. The next prime is 611111000021. The reversal of 611111000000 is 111116.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 694445 + ... + 1305555.

Almost surely, 2^611111000000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 611111000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (757912407972).

611111000000 is an abundant number, since it is smaller than the sum of its proper divisors (904713815944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

611111000000 is an frugal number, since it uses more digits than its factorization.

611111000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611153 (or 611118 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 611111000000 its reverse (111116), we get a palindrome (611111111116).

The spelling of 611111000000 in words is "six hundred eleven billion, one hundred eleven million", and thus it is an aban number.