610641720 has 512 divisors, whose sum is σ = 2399846400. Its totient is φ = 136857600.

The previous prime is 610641637. The next prime is 610641721. The reversal of 610641720 is 27146016.

610641720 is a `hidden beast` number, since 6 + 10 + 641 + 7 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (610641721) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 10010490 + ... + 10010550.

It is an arithmetic number, because the mean of its divisors is an integer number (4687200).

Almost surely, 2^610641720 is an apocalyptic number.

610641720 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 610641720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1199923200).

610641720 is an abundant number, since it is smaller than the sum of its proper divisors (1789204680).

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

610641720 is a wasteful number, since it uses less digits than its factorization.

610641720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 610641720 is about 24711.1658972214. The cubic root of 610641720 is about 848.3899024304.

Adding to 610641720 its reverse (27146016), we get a palindrome (637787736).

The spelling of 610641720 in words is "six hundred ten million, six hundred forty-one thousand, seven hundred twenty".