16422997501 has 4 divisors (see below), whose sum is σ = 16429897404. Its totient is φ = 16416097600.

The previous prime is 16422997477. The next prime is 16422997561. The reversal of 16422997501 is 10579922461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5579940601 + 10843056900 = 74699^2 + 104130^2 .

It is a cyclic number.

It is not a de Polignac number, because 16422997501 - 2¹⁹ = 16422473213 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 (16422997561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3446380 + ... + 3451141.

It is an arithmetic number, because the mean of its divisors is an integer number (4107474351).

Almost surely, 2^16422997501 is an apocalyptic number.

It is an amenable number.

16422997501 is a deficient number, since it is larger than the sum of its proper divisors (6899903).

16422997501 is an equidigital number, since it uses as much as digits as its factorization.

16422997501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6899902.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 16422997501 in words is "sixteen billion, four hundred twenty-two million, nine hundred ninety-seven thousand, five hundred one".