1621382754680 has 64 divisors (see below), whose sum is σ = 3928963268160. Its totient is φ = 598629639168.

The previous prime is 1621382754679. The next prime is 1621382754731. The reversal of 1621382754680 is 864572831261.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9941069 + ... + 10102851.

It is an arithmetic number, because the mean of its divisors is an integer number (61390051065).

Almost surely, 2^{1621382754680} is an apocalyptic number.

1621382754680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1621382754680 is an abundant number, since it is smaller than the sum of its proper divisors (2307580513480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1621382754680 is a wasteful number, since it uses less digits than its factorization.

1621382754680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181080 (or 181076 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 1621382754680 in words is "one trillion, six hundred twenty-one billion, three hundred eighty-two million, seven hundred fifty-four thousand, six hundred eighty".