1428755217644 has 6 divisors (see below), whose sum is σ = 2500321630884. Its totient is φ = 714377608820.

The previous prime is 1428755217641. The next prime is 1428755217653. The reversal of 1428755217644 is 4467125578241.

It is a self number, because there is not a number n which added to its sum of digits gives 1428755217644.

It is not an unprimeable number, because it can be changed into a prime (1428755217641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178594402202 + ... + 178594402209.

It is an arithmetic number, because the mean of its divisors is an integer number (416720271814).

Almost surely, 2^{1428755217644} is an apocalyptic number.

It is an amenable number.

1428755217644 is a deficient number, since it is larger than the sum of its proper divisors (1071566413240).

1428755217644 is a wasteful number, since it uses less digits than its factorization.

1428755217644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357188804415 (or 357188804413 counting only the distinct ones).

The product of its digits is 15052800, while the sum is 56.

The spelling of 1428755217644 in words is "one trillion, four hundred twenty-eight billion, seven hundred fifty-five million, two hundred seventeen thousand, six hundred forty-four".