16422057987 has 8 divisors (see below), whose sum is σ = 23184081936. Its totient is φ = 10304036352.

The previous prime is 16422057947. The next prime is 16422057989. The reversal of 16422057987 is 78975022461.

It is a happy number.

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

It is not a de Polignac number, because 16422057987 - 2¹⁹ = 16421533699 is a prime.

It is a super-3 number, since 3×16422057987³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 322001137 = 16422057987 / (1 + 6 + 4 + 2 + 2 + 0 + 5 + 7 + 9 + 8 + 7).

It is not an unprimeable number, because it can be changed into a prime (16422057989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161000518 + ... + 161000619.

It is an arithmetic number, because the mean of its divisors is an integer number (2898010242).

Almost surely, 2^16422057987 is an apocalyptic number.

16422057987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

16422057987 is a deficient number, since it is larger than the sum of its proper divisors (6762023949).

16422057987 is a wasteful number, since it uses less digits than its factorization.

16422057987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322001157.

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 16422057987 in words is "sixteen billion, four hundred twenty-two million, fifty-seven thousand, nine hundred eighty-seven".