16500601501 has 4 divisors (see below), whose sum is σ = 16726637212. Its totient is φ = 16274565792.

The previous prime is 16500601463. The next prime is 16500601529. The reversal of 16500601501 is 10510600561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10510600561 = 31 ⋅339051631.

It can be written as a sum of positive squares in 2 ways, for example, as 7301873401 + 9198728100 = 85451^2 + 95910^2 .

It is a cyclic number.

It is not a de Polignac number, because 16500601501 - 2¹³ = 16500593309 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 (16500601531) 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 3 ways as a sum of consecutive naturals, for example, 113017746 + ... + 113017891.

It is an arithmetic number, because the mean of its divisors is an integer number (4181659303).

Almost surely, 2^16500601501 is an apocalyptic number.

It is an amenable number.

16500601501 is a deficient number, since it is larger than the sum of its proper divisors (226035711).

16500601501 is an equidigital number, since it uses as much as digits as its factorization.

16500601501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226035710.

The product of its (nonzero) digits is 900, while the sum is 25.

It can be divided in two parts, 1650060 and 1501, that added together give a palindrome (1651561).

The spelling of 16500601501 in words is "sixteen billion, five hundred million, six hundred one thousand, five hundred one".