620510501624421 has 16 divisors (see below), whose sum is σ = 876317212923264. Its totient is φ = 389205528321024.

The previous prime is 620510501624407. The next prime is 620510501624449. The reversal of 620510501624421 is 124426105015026.

It is not a de Polignac number, because 620510501624421 - 2⁵ = 620510501624389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 620510501624421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620510501624821) 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, 2099761225 + ... + 2100056718.

It is an arithmetic number, because the mean of its divisors is an integer number (54769825807704).

Almost surely, 2^{620510501624421} is an apocalyptic number.

It is an amenable number.

620510501624421 is a deficient number, since it is larger than the sum of its proper divisors (255806711298843).

620510501624421 is a wasteful number, since it uses less digits than its factorization.

620510501624421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4199820860.

The product of its (nonzero) digits is 115200, while the sum is 39.

Adding to 620510501624421 its reverse (124426105015026), we get a palindrome (744936606639447).

The spelling of 620510501624421 in words is "six hundred twenty trillion, five hundred ten billion, five hundred one million, six hundred twenty-four thousand, four hundred twenty-one".