620401543550 has 12 divisors (see below), whose sum is σ = 1153946871096. Its totient is φ = 248160617400.

The previous prime is 620401543549. The next prime is 620401543579. The reversal of 620401543550 is 55345104026.

It is a self number, because there is not a number n which added to its sum of digits gives 620401543550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6204015386 + ... + 6204015485.

It is an arithmetic number, because the mean of its divisors is an integer number (96162239258).

Almost surely, 2^620401543550 is an apocalyptic number.

620401543550 is a deficient number, since it is larger than the sum of its proper divisors (533545327546).

620401543550 is a wasteful number, since it uses less digits than its factorization.

620401543550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12408030883 (or 12408030878 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 620401543550 its reverse (55345104026), we get a palindrome (675746647576).

The spelling of 620401543550 in words is "six hundred twenty billion, four hundred one million, five hundred forty-three thousand, five hundred fifty".