16256207541820 has 48 divisors (see below), whose sum is σ = 36146657641248. Its totient is φ = 6119899013120.

The previous prime is 16256207541817. The next prime is 16256207541943. The reversal of 16256207541820 is 2814570265261.

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, 27644460 + ... + 28226380.

It is an arithmetic number, because the mean of its divisors is an integer number (753055367526).

Almost surely, 2^{16256207541820} is an apocalyptic number.

16256207541820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16256207541820 is an abundant number, since it is smaller than the sum of its proper divisors (19890450099428).

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

16256207541820 is a wasteful number, since it uses less digits than its factorization.

16256207541820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664110 (or 664108 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 16256207541820 in words is "sixteen trillion, two hundred fifty-six billion, two hundred seven million, five hundred forty-one thousand, eight hundred twenty".