620121649859 has 4 divisors (see below), whose sum is σ = 640125574080. Its totient is φ = 600117725640.

The previous prime is 620121649841. The next prime is 620121649883. The reversal of 620121649859 is 958946121026.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 620121649859 - 2²⁰ = 620120601283 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 620121649859.

It is not an unprimeable number, because it can be changed into a prime (620121642859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10001962064 + ... + 10001962125.

It is an arithmetic number, because the mean of its divisors is an integer number (160031393520).

Almost surely, 2^620121649859 is an apocalyptic number.

620121649859 is a deficient number, since it is larger than the sum of its proper divisors (20003924221).

620121649859 is a wasteful number, since it uses less digits than its factorization.

620121649859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20003924220.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 620121649859 in words is "six hundred twenty billion, one hundred twenty-one million, six hundred forty-nine thousand, eight hundred fifty-nine".