16502253487 has 4 divisors (see below), whose sum is σ = 16948260376. Its totient is φ = 16056246600.

The previous prime is 16502253461. The next prime is 16502253499. The reversal of 16502253487 is 78435220561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78435220561 = 659 ⋅119021579.

It is a cyclic number.

It is not a de Polignac number, because 16502253487 - 2²⁷ = 16368035759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16502253457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223003389 + ... + 223003462.

It is an arithmetic number, because the mean of its divisors is an integer number (4237065094).

Almost surely, 2^16502253487 is an apocalyptic number.

16502253487 is a deficient number, since it is larger than the sum of its proper divisors (446006889).

16502253487 is an equidigital number, since it uses as much as digits as its factorization.

16502253487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446006888.

The product of its (nonzero) digits is 403200, while the sum is 43.

It can be divided in two parts, 1650225 and 3487, that multiplied together give a palindrome (5754334575).

The spelling of 16502253487 in words is "sixteen billion, five hundred two million, two hundred fifty-three thousand, four hundred eighty-seven".