28421788951680 has 128 divisors (see below), whose sum is σ = 91474010709120. Its totient is φ = 7505559748608.

The previous prime is 28421788951669. The next prime is 28421788951693. The reversal of 28421788951680 is 8615988712482.

It is a tau number, because it is divible by the number of its divisors (128).

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, 71661537 + ... + 72057056.

It is an arithmetic number, because the mean of its divisors is an integer number (714640708665).

Almost surely, 2^{28421788951680} is an apocalyptic number.

28421788951680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28421788951680 is an abundant number, since it is smaller than the sum of its proper divisors (63052221757440).

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

28421788951680 is a wasteful number, since it uses less digits than its factorization.

28421788951680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143718718 (or 143718706 counting only the distinct ones).

The product of its (nonzero) digits is 123863040, while the sum is 69.

The spelling of 28421788951680 in words is "twenty-eight trillion, four hundred twenty-one billion, seven hundred eighty-eight million, nine hundred fifty-one thousand, six hundred eighty".