621063426340 has 24 divisors (see below), whose sum is σ = 1490552223552. Its totient is φ = 212936031840.

The previous prime is 621063426329. The next prime is 621063426343. The reversal of 621063426340 is 43624360126.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 621063426340.

It is not an unprimeable number, because it can be changed into a prime (621063426343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2218083526 + ... + 2218083805.

It is an arithmetic number, because the mean of its divisors is an integer number (62106342648).

Almost surely, 2^621063426340 is an apocalyptic number.

It is an amenable number.

621063426340 is an abundant number, since it is smaller than the sum of its proper divisors (869488797212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621063426340 is a wasteful number, since it uses less digits than its factorization.

621063426340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4436167347 (or 4436167345 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 37.

Adding to 621063426340 its reverse (43624360126), we get a palindrome (664687786466).

The spelling of 621063426340 in words is "six hundred twenty-one billion, sixty-three million, four hundred twenty-six thousand, three hundred forty".