620555645634477 has 32 divisors (see below), whose sum is σ = 961121359653120. Its totient is φ = 348786075064320.

The previous prime is 620555645634437. The next prime is 620555645634481. The reversal of 620555645634477 is 774436546555026.

It is a happy number.

620555645634477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-620555645634477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620555645634427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111278299 + ... + 116721767.

It is an arithmetic number, because the mean of its divisors is an integer number (30035042489160).

Almost surely, 2^{620555645634477} is an apocalyptic number.

It is an amenable number.

620555645634477 is a deficient number, since it is larger than the sum of its proper divisors (340565714018643).

620555645634477 is a wasteful number, since it uses less digits than its factorization.

620555645634477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5532533.

The product of its (nonzero) digits is 2540160000, while the sum is 69.

The spelling of 620555645634477 in words is "six hundred twenty trillion, five hundred fifty-five billion, six hundred forty-five million, six hundred thirty-four thousand, four hundred seventy-seven".