620817337621 has 8 divisors (see below), whose sum is σ = 668623880960. Its totient is φ = 573018131952.

The previous prime is 620817337607. The next prime is 620817337717. The reversal of 620817337621 is 126733718026.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620817337621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620817337121) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1658061 + ... + 1997698.

It is an arithmetic number, because the mean of its divisors is an integer number (83577985120).

Almost surely, 2^620817337621 is an apocalyptic number.

It is an amenable number.

620817337621 is a deficient number, since it is larger than the sum of its proper divisors (47806543339).

620817337621 is a wasteful number, since it uses less digits than its factorization.

620817337621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3668835.

The product of its (nonzero) digits is 508032, while the sum is 46.

The spelling of 620817337621 in words is "six hundred twenty billion, eight hundred seventeen million, three hundred thirty-seven thousand, six hundred twenty-one".