611535489768 has 256 divisors, whose sum is σ = 1999895040000. Its totient is φ = 169513005312.

The previous prime is 611535489767. The next prime is 611535489893. The reversal of 611535489768 is 867984535116.

611535489768 is a `hidden beast` number, since 6 + 1 + 1 + 535 + 4 + 8 + 97 + 6 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (611535489767) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9655821 + ... + 9718947.

It is an arithmetic number, because the mean of its divisors is an integer number (7812090000).

Almost surely, 2^611535489768 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 611535489768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (999947520000).

611535489768 is an abundant number, since it is smaller than the sum of its proper divisors (1388359550232).

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

611535489768 is a wasteful number, since it uses less digits than its factorization.

611535489768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63341 (or 63331 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 63.

The spelling of 611535489768 in words is "six hundred eleven billion, five hundred thirty-five million, four hundred eighty-nine thousand, seven hundred sixty-eight".