1620809556830 has 16 divisors (see below), whose sum is σ = 2920768747344. Its totient is φ = 647587923840.

The previous prime is 1620809556827. The next prime is 1620809556871. The reversal of 1620809556830 is 386559080261.

It is a super-2 number, since 2×1620809556830² (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, 91978112 + ... + 91995731.

It is an arithmetic number, because the mean of its divisors is an integer number (182548046709).

Almost surely, 2^{1620809556830} is an apocalyptic number.

1620809556830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1620809556830 is a deficient number, since it is larger than the sum of its proper divisors (1299959190514).

1620809556830 is a wasteful number, since it uses less digits than its factorization.

1620809556830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183974731.

The product of its (nonzero) digits is 3110400, while the sum is 53.

The spelling of 1620809556830 in words is "one trillion, six hundred twenty billion, eight hundred nine million, five hundred fifty-six thousand, eight hundred thirty".