621503120342 has 16 divisors (see below), whose sum is σ = 1009011645600. Its totient is φ = 285406146432.

The previous prime is 621503120297. The next prime is 621503120353. The reversal of 621503120342 is 243021305126.

It is a happy number.

It is a super-2 number, since 2×621503120342² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60055043 + ... + 60065390.

It is an arithmetic number, because the mean of its divisors is an integer number (63063227850).

Almost surely, 2^621503120342 is an apocalyptic number.

621503120342 is a deficient number, since it is larger than the sum of its proper divisors (387508525258).

621503120342 is a wasteful number, since it uses less digits than its factorization.

621503120342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120120647.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 621503120342 its reverse (243021305126), we get a palindrome (864524425468).

The spelling of 621503120342 in words is "six hundred twenty-one billion, five hundred three million, one hundred twenty thousand, three hundred forty-two".