621375899076 has 45 divisors (see below), whose sum is σ = 1624436434621. Its totient is φ = 207120570048.

The previous prime is 621375899021. The next prime is 621375899083. The reversal of 621375899076 is 670998573126.

The square root of 621375899076 is 788274.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 591714792900 + 29661106176 = 769230^2 + 172224^2 .

It is a super-2 number, since 2×621375899076² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 14167036 + ... + 14210828.

Almost surely, 2^621375899076 is an apocalyptic number.

621375899076 is the 788274-th square number.

It is an amenable number.

621375899076 is an abundant number, since it is smaller than the sum of its proper divisors (1003060535545).

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

621375899076 is an frugal number, since it uses more digits than its factorization.

621375899076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87602 (or 43798 counting only the distinct ones).

The product of its (nonzero) digits is 34292160, while the sum is 63.

The spelling of 621375899076 in words is "six hundred twenty-one billion, three hundred seventy-five million, eight hundred ninety-nine thousand, seventy-six".