611601720 has 64 divisors (see below), whose sum is σ = 1836432000. Its totient is φ = 162949248.

The previous prime is 611601713. The next prime is 611601733. The reversal of 611601720 is 27106116.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260311 + ... + 262649.

It is an arithmetic number, because the mean of its divisors is an integer number (28694250).

Almost surely, 2^611601720 is an apocalyptic number.

611601720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

611601720 is an abundant number, since it is smaller than the sum of its proper divisors (1224830280).

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

611601720 is a wasteful number, since it uses less digits than its factorization.

611601720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4532 (or 4528 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 611601720 is about 24730.5826862207. The cubic root of 611601720 is about 848.8342589417.

Adding to 611601720 its reverse (27106116), we get a palindrome (638707836).

The spelling of 611601720 in words is "six hundred eleven million, six hundred one thousand, seven hundred twenty".