16021651503 has 48 divisors (see below), whose sum is σ = 25320339968. Its totient is φ = 8951342400.

The previous prime is 16021651493. The next prime is 16021651517. The reversal of 16021651503 is 30515612061.

It is not a de Polignac number, because 16021651503 - 2⁴ = 16021651487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16021652503) 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 47 ways as a sum of consecutive naturals, for example, 4561518 + ... + 4565028.

Almost surely, 2^16021651503 is an apocalyptic number.

16021651503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16021651503 is a deficient number, since it is larger than the sum of its proper divisors (9298688465).

16021651503 is a wasteful number, since it uses less digits than its factorization.

16021651503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4516 (or 4505 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The spelling of 16021651503 in words is "sixteen billion, twenty-one million, six hundred fifty-one thousand, five hundred three".