1028508191644 has 24 divisors (see below), whose sum is σ = 1827290214288. Its totient is φ = 506429784960.

The previous prime is 1028508191639. The next prime is 1028508191707. The reversal of 1028508191644 is 4461918058201.

It is a super-2 number, since 2×1028508191644² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352464 + ... + 1476904.

It is an arithmetic number, because the mean of its divisors is an integer number (76137092262).

Almost surely, 2^{1028508191644} is an apocalyptic number.

It is an amenable number.

1028508191644 is a deficient number, since it is larger than the sum of its proper divisors (798782022644).

1028508191644 is a wasteful number, since it uses less digits than its factorization.

1028508191644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127925 (or 1127923 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 49.

The spelling of 1028508191644 in words is "one trillion, twenty-eight billion, five hundred eight million, one hundred ninety-one thousand, six hundred forty-four".