620649803658 has 8 divisors (see below), whose sum is σ = 1241299607328. Its totient is φ = 206883267884.

The previous prime is 620649803581. The next prime is 620649803663. The reversal of 620649803658 is 856308946026.

It is a sphenic number, since it is the product of 3 distinct primes.

620649803658 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 620649803598 and 620649803607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51720816966 + ... + 51720816977.

It is an arithmetic number, because the mean of its divisors is an integer number (155162450916).

Almost surely, 2^620649803658 is an apocalyptic number.

620649803658 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

620649803658 is a wasteful number, since it uses less digits than its factorization.

620649803658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103441633948.

The product of its (nonzero) digits is 14929920, while the sum is 57.

The spelling of 620649803658 in words is "six hundred twenty billion, six hundred forty-nine million, eight hundred three thousand, six hundred fifty-eight".