16256515523 has 16 divisors (see below), whose sum is σ = 17589156480. Its totient is φ = 14966071296.

The previous prime is 16256515487. The next prime is 16256515531. The reversal of 16256515523 is 32551565261.

It is a cyclic number.

It is not a de Polignac number, because 16256515523 - 2⁸ = 16256515267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16256515553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1683473 + ... + 1693101.

It is an arithmetic number, because the mean of its divisors is an integer number (1099322280).

Almost surely, 2^16256515523 is an apocalyptic number.

16256515523 is a deficient number, since it is larger than the sum of its proper divisors (1332640957).

16256515523 is a wasteful number, since it uses less digits than its factorization.

16256515523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11806.

The product of its digits is 270000, while the sum is 41.

The spelling of 16256515523 in words is "sixteen billion, two hundred fifty-six million, five hundred fifteen thousand, five hundred twenty-three".