629905719556 has 9 divisors (see below), whose sum is σ = 1102337787061. Its totient is φ = 314952066112.

The previous prime is 629905719451. The next prime is 629905719563. The reversal of 629905719556 is 655917509926.

The square root of 629905719556 is 793666.

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., 64979108100 + 564926611456 = 254910^2 + 751616^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1388916 + ... + 1785748.

Almost surely, 2^629905719556 is an apocalyptic number.

629905719556 is the 793666-th square number.

It is an amenable number.

629905719556 is a deficient number, since it is larger than the sum of its proper divisors (472432067505).

629905719556 is an frugal number, since it uses more digits than its factorization.

629905719556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793670 (or 396835 counting only the distinct ones).

The product of its (nonzero) digits is 45927000, while the sum is 64.

Multiplying 629905719556 by its sum of digits (64), we get a square (40313966051584 = 6349328²).

The spelling of 629905719556 in words is "six hundred twenty-nine billion, nine hundred five million, seven hundred nineteen thousand, five hundred fifty-six".