16256543401 has 8 divisors (see below), whose sum is σ = 18584086400. Its totient is φ = 13930295328.

The previous prime is 16256543383. The next prime is 16256543423. The reversal of 16256543401 is 10434565261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16256543401 - 2⁷ = 16256543273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16256543101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296676 + ... + 347173.

It is an arithmetic number, because the mean of its divisors is an integer number (2323010800).

Almost surely, 2^16256543401 is an apocalyptic number.

It is an amenable number.

16256543401 is a deficient number, since it is larger than the sum of its proper divisors (2327542999).

16256543401 is an equidigital number, since it uses as much as digits as its factorization.

16256543401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647463.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 16256543401 in words is "sixteen billion, two hundred fifty-six million, five hundred forty-three thousand, four hundred one".