1628278357856 has 48 divisors (see below), whose sum is σ = 3243554181504. Its totient is φ = 804571874304.

The previous prime is 1628278357847. The next prime is 1628278357883. The reversal of 1628278357856 is 6587538728261.

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, 144866 + ... + 1810398.

It is an arithmetic number, because the mean of its divisors is an integer number (67574045448).

Almost surely, 2^{1628278357856} is an apocalyptic number.

1628278357856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1628278357856 is a deficient number, since it is larger than the sum of its proper divisors (1615275823648).

1628278357856 is a wasteful number, since it uses less digits than its factorization.

1628278357856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665903 (or 1665895 counting only the distinct ones).

The product of its digits is 270950400, while the sum is 68.

The spelling of 1628278357856 in words is "one trillion, six hundred twenty-eight billion, two hundred seventy-eight million, three hundred fifty-seven thousand, eight hundred fifty-six".