611610020 has 96 divisors (see below), whose sum is σ = 1621928448. Its totient is φ = 188762112.

The previous prime is 611610017. The next prime is 611610031. The reversal of 611610020 is 20016116.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

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, 49154 + ... + 60326.

It is an arithmetic number, because the mean of its divisors is an integer number (16895088).

Almost surely, 2^611610020 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 611610020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (810964224).

611610020 is an abundant number, since it is smaller than the sum of its proper divisors (1010318428).

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

611610020 is a wasteful number, since it uses less digits than its factorization.

611610020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11229 (or 11227 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 611610020 is about 24730.7504940711. The cubic root of 611610020 is about 848.8380987458.

Adding to 611610020 its reverse (20016116), we get a palindrome (631626136).

The spelling of 611610020 in words is "six hundred eleven million, six hundred ten thousand, twenty".