629661693987 has 16 divisors (see below), whose sum is σ = 954525911680. Its totient is φ = 410012265096.

The previous prime is 629661693971. The next prime is 629661694049. The reversal of 629661693987 is 789396166926.

It is not a de Polignac number, because 629661693987 - 2⁴ = 629661693971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (629661693917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271170973 + ... + 271173294.

It is an arithmetic number, because the mean of its divisors is an integer number (59657869480).

Almost surely, 2^629661693987 is an apocalyptic number.

629661693987 is a deficient number, since it is larger than the sum of its proper divisors (324864217693).

629661693987 is a wasteful number, since it uses less digits than its factorization.

629661693987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542344319 (or 542344313 counting only the distinct ones).

The product of its digits is 317447424, while the sum is 72.

The spelling of 629661693987 in words is "six hundred twenty-nine billion, six hundred sixty-one million, six hundred ninety-three thousand, nine hundred eighty-seven".