620416321563 has 16 divisors (see below), whose sum is σ = 876110652576. Its totient is φ = 389179146240.

The previous prime is 620416321559. The next prime is 620416321579. The reversal of 620416321563 is 365123614026.

It is not a de Polignac number, because 620416321563 - 2² = 620416321559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (620416321583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1391398 + ... + 1782363.

It is an arithmetic number, because the mean of its divisors is an integer number (54756915786).

Almost surely, 2^620416321563 is an apocalyptic number.

620416321563 is a deficient number, since it is larger than the sum of its proper divisors (255694331013).

620416321563 is a wasteful number, since it uses less digits than its factorization.

620416321563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3177614.

The product of its (nonzero) digits is 155520, while the sum is 39.

Adding to 620416321563 its reverse (365123614026), we get a palindrome (985539935589).

The spelling of 620416321563 in words is "six hundred twenty billion, four hundred sixteen million, three hundred twenty-one thousand, five hundred sixty-three".