42729052668 has 12 divisors (see below), whose sum is σ = 99701122920. Its totient is φ = 14243017552.

The previous prime is 42729052649. The next prime is 42729052693. The reversal of 42729052668 is 86625092724.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 42729052668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1780377183 + ... + 1780377206.

It is an arithmetic number, because the mean of its divisors is an integer number (8308426910).

Almost surely, 2^42729052668 is an apocalyptic number.

It is an amenable number.

42729052668 is an abundant number, since it is smaller than the sum of its proper divisors (56972070252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42729052668 is a wasteful number, since it uses less digits than its factorization.

42729052668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3560754396 (or 3560754394 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 42729052668 in words is "forty-two billion, seven hundred twenty-nine million, fifty-two thousand, six hundred sixty-eight".