629985811679 has 4 divisors (see below), whose sum is σ = 719983784784. Its totient is φ = 539987838576.

The previous prime is 629985811669. The next prime is 629985811681. The reversal of 629985811679 is 976118589926.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 629985811679 - 2²⁴ = 629969034463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (629985811619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44998986542 + ... + 44998986555.

It is an arithmetic number, because the mean of its divisors is an integer number (179995946196).

Almost surely, 2^629985811679 is an apocalyptic number.

629985811679 is a deficient number, since it is larger than the sum of its proper divisors (89997973105).

629985811679 is an equidigital number, since it uses as much as digits as its factorization.

629985811679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89997973104.

The product of its digits is 117573120, while the sum is 71.

The spelling of 629985811679 in words is "six hundred twenty-nine billion, nine hundred eighty-five million, eight hundred eleven thousand, six hundred seventy-nine".