1628904842949 has 8 divisors (see below), whose sum is σ = 2172081339072. Its totient is φ = 1085832454400.

The previous prime is 1628904842947. The next prime is 1628904842953. The reversal of 1628904842949 is 9492484098261.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1628904842949 - 2¹ = 1628904842947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1628904842949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628904842947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25990377 + ... + 26052974.

It is an arithmetic number, because the mean of its divisors is an integer number (271510167384).

Almost surely, 2^{1628904842949} is an apocalyptic number.

It is an amenable number.

1628904842949 is a deficient number, since it is larger than the sum of its proper divisors (543176496123).

1628904842949 is a wasteful number, since it uses less digits than its factorization.

1628904842949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52053787.

The product of its (nonzero) digits is 71663616, while the sum is 66.

The spelling of 1628904842949 in words is "one trillion, six hundred twenty-eight billion, nine hundred four million, eight hundred forty-two thousand, nine hundred forty-nine".