629846989641 has 45 divisors (see below), whose sum is σ = 950768920101. Its totient is φ = 415531446336.

The previous prime is 629846989633. The next prime is 629846989693. The reversal of 629846989641 is 146989648926.

The square root of 629846989641 is 793629.

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

629846989641 is a `hidden beast` number, since 6 + 29 + 8 + 469 + 89 + 64 + 1 = 666.

629846989641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 221295917241 + 408551072400 = 470421^2 + 639180^2 .

It is not a de Polignac number, because 629846989641 - 2³ = 629846989633 is a prime.

It is a super-2 number, since 2×629846989641² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 629846989641.

It is not an unprimeable number, because it can be changed into a prime (629846989841) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 778549645 + ... + 778550453.

Almost surely, 2^629846989641 is an apocalyptic number.

629846989641 is the 793629-th square number.

629846989641 is the 396815-th centered octagonal number.

It is an amenable number.

629846989641 is a deficient number, since it is larger than the sum of its proper divisors (320921930460).

629846989641 is an frugal number, since it uses more digits than its factorization.

629846989641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1848 (or 921 counting only the distinct ones).

The product of its digits is 322486272, while the sum is 72.

The spelling of 629846989641 in words is "six hundred twenty-nine billion, eight hundred forty-six million, nine hundred eighty-nine thousand, six hundred forty-one".