620394063660 has 432 divisors, whose sum is σ = 2308366045440. Its totient is φ = 134105207040.

The previous prime is 620394063649. The next prime is 620394063673. The reversal of 620394063660 is 66360493026.

It is a happy number.

620394063660 is a `hidden beast` number, since 6 + 2 + 0 + 3 + 9 + 4 + 0 + 636 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 105740047 + ... + 105745913.

It is an arithmetic number, because the mean of its divisors is an integer number (5343439920).

Almost surely, 2^620394063660 is an apocalyptic number.

620394063660 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 620394063660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1154183022720).

620394063660 is an abundant number, since it is smaller than the sum of its proper divisors (1687971981780).

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

620394063660 is a wasteful number, since it uses less digits than its factorization.

620394063660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6546 (or 6534 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 45.

The spelling of 620394063660 in words is "six hundred twenty billion, three hundred ninety-four million, sixty-three thousand, six hundred sixty".