620691844608 has 480 divisors, whose sum is σ = 2037742147584. Its totient is φ = 180172800000.

The previous prime is 620691844607. The next prime is 620691844613. The reversal of 620691844608 is 806448196026.

620691844608 is a `hidden beast` number, since 6 + 20 + 6 + 9 + 1 + 8 + 4 + 4 + 608 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620691844603) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 158702173 + ... + 158706083.

Almost surely, 2^620691844608 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 620691844608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1018871073792).

620691844608 is an abundant number, since it is smaller than the sum of its proper divisors (1417050302976).

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

620691844608 is a wasteful number, since it uses less digits than its factorization.

620691844608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4078 (or 4059 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

It can be divided in two parts, 6206918 and 44608, that added together give a palindrome (6251526).

The spelling of 620691844608 in words is "six hundred twenty billion, six hundred ninety-one million, eight hundred forty-four thousand, six hundred eight".