629440855081 has 16 divisors (see below), whose sum is σ = 637453800000. Its totient is φ = 621487119808.

The previous prime is 629440855073. The next prime is 629440855193. The reversal of 629440855081 is 180558044926.

It is a cyclic number.

It is not a de Polignac number, because 629440855081 - 2³ = 629440855073 is a prime.

It is a super-2 number, since 2×629440855081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (629440855051) 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, 22072170 + ... + 22100668.

It is an arithmetic number, because the mean of its divisors is an integer number (39840862500).

Almost surely, 2^629440855081 is an apocalyptic number.

It is an amenable number.

629440855081 is a deficient number, since it is larger than the sum of its proper divisors (8012944919).

629440855081 is a wasteful number, since it uses less digits than its factorization.

629440855081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29528.

The product of its (nonzero) digits is 2764800, while the sum is 52.

The spelling of 629440855081 in words is "six hundred twenty-nine billion, four hundred forty million, eight hundred fifty-five thousand, eighty-one".