16501673253 has 24 divisors (see below), whose sum is σ = 24468845088. Its totient is φ = 9880408512.

The previous prime is 16501673239. The next prime is 16501673297. The reversal of 16501673253 is 35237610561.

It is not a de Polignac number, because 16501673253 - 2²¹ = 16499576101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16501673233) 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, 421075 + ... + 458592.

It is an arithmetic number, because the mean of its divisors is an integer number (1019535212).

Almost surely, 2^16501673253 is an apocalyptic number.

16501673253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16501673253 is a deficient number, since it is larger than the sum of its proper divisors (7967171835).

16501673253 is a wasteful number, since it uses less digits than its factorization.

16501673253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879733 (or 879720 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 39.

The spelling of 16501673253 in words is "sixteen billion, five hundred one million, six hundred seventy-three thousand, two hundred fifty-three".