16581054525 has 24 divisors (see below), whose sum is σ = 31330298304. Its totient is φ = 7579910400.

The previous prime is 16581054473. The next prime is 16581054527. The reversal of 16581054525 is 52545018561.

It is not a de Polignac number, because 16581054525 - 2⁶ = 16581054461 is a prime.

It is a super-2 number, since 2×16581054525² (a number of 21 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16581054527) 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 23 ways as a sum of consecutive naturals, for example, 15790956 + ... + 15792005.

It is an arithmetic number, because the mean of its divisors is an integer number (1305429096).

Almost surely, 2^16581054525 is an apocalyptic number.

16581054525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16581054525 is a deficient number, since it is larger than the sum of its proper divisors (14749243779).

16581054525 is a wasteful number, since it uses less digits than its factorization.

16581054525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31582981 (or 31582976 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 42.

The spelling of 16581054525 in words is "sixteen billion, five hundred eighty-one million, fifty-four thousand, five hundred twenty-five".