16256576538 has 24 divisors (see below), whose sum is σ = 35234585568. Its totient is φ = 5417012232.

The previous prime is 16256576533. The next prime is 16256576543. The reversal of 16256576538 is 83567565261.

It is a happy number.

16256576538 is a `hidden beast` number, since 1 + 6 + 2 + 56 + 57 + 6 + 538 = 666.

It is an interprime number because it is at equal distance from previous prime (16256576533) and next prime (16256576543).

It is not an unprimeable number, because it can be changed into a prime (16256576533) 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 11 ways as a sum of consecutive naturals, for example, 99070 + ... + 205737.

It is an arithmetic number, because the mean of its divisors is an integer number (1468107732).

Almost surely, 2^16256576538 is an apocalyptic number.

16256576538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16256576538 is an abundant number, since it is smaller than the sum of its proper divisors (18978009030).

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

16256576538 is a wasteful number, since it uses less digits than its factorization.

16256576538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307778 (or 307775 counting only the distinct ones).

The product of its digits is 9072000, while the sum is 54.

The spelling of 16256576538 in words is "sixteen billion, two hundred fifty-six million, five hundred seventy-six thousand, five hundred thirty-eight".