611542311864 has 192 divisors, whose sum is σ = 1769560007040. Its totient is φ = 174610318080.

The previous prime is 611542311829. The next prime is 611542311869. The reversal of 611542311864 is 468113245116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611542311869) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9324274 + ... + 9389630.

It is an arithmetic number, because the mean of its divisors is an integer number (9216458370).

Almost surely, 2^611542311864 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 611542311864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (884780003520).

611542311864 is an abundant number, since it is smaller than the sum of its proper divisors (1158017695176).

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

611542311864 is a wasteful number, since it uses less digits than its factorization.

611542311864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65490 (or 65463 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The spelling of 611542311864 in words is "six hundred eleven billion, five hundred forty-two million, three hundred eleven thousand, eight hundred sixty-four".