16861457523 has 8 divisors (see below), whose sum is σ = 22713716368. Its totient is φ = 11125085184.

The previous prime is 16861457521. The next prime is 16861457533. The reversal of 16861457523 is 32575416861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16861457523 - 2¹ = 16861457521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16861457521) 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 7 ways as a sum of consecutive naturals, for example, 28971286 + ... + 28971867.

It is an arithmetic number, because the mean of its divisors is an integer number (2839214546).

Almost surely, 2^16861457523 is an apocalyptic number.

16861457523 is a deficient number, since it is larger than the sum of its proper divisors (5852258845).

16861457523 is an equidigital number, since it uses as much as digits as its factorization.

16861457523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57943253.

The product of its digits is 1209600, while the sum is 48.

The spelling of 16861457523 in words is "sixteen billion, eight hundred sixty-one million, four hundred fifty-seven thousand, five hundred twenty-three".