611143680 has 416 divisors, whose sum is σ = 2359008000. Its totient is φ = 134873088.

The previous prime is 611143669. The next prime is 611143697. The reversal of 611143680 is 86341116.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21073906 + ... + 21073934.

Almost surely, 2^611143680 is an apocalyptic number.

611143680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 611143680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1179504000).

611143680 is an abundant number, since it is smaller than the sum of its proper divisors (1747864320).

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

611143680 is an equidigital number, since it uses as much as digits as its factorization.

611143680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 611143680 is about 24721.3203530879. The cubic root of 611143680 is about 848.6223033876.

Adding to 611143680 its reverse (86341116), we get a palindrome (697484796).

The spelling of 611143680 in words is "six hundred eleven million, one hundred forty-three thousand, six hundred eighty".