16501422125 has 8 divisors (see below), whose sum is σ = 20593774968. Its totient is φ = 13201137600.

The previous prime is 16501422083. The next prime is 16501422143. The reversal of 16501422125 is 52122410561.

It can be written as a sum of positive squares in 4 ways, for example, as 83868964 + 16417553161 = 9158^2 + 128131^2 .

It is not a de Polignac number, because 16501422125 - 2¹² = 16501418029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66005564 + ... + 66005813.

It is an arithmetic number, because the mean of its divisors is an integer number (2574221871).

Almost surely, 2^16501422125 is an apocalyptic number.

It is an amenable number.

16501422125 is a deficient number, since it is larger than the sum of its proper divisors (4092352843).

16501422125 is an equidigital number, since it uses as much as digits as its factorization.

16501422125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132011392 (or 132011382 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 16501422125 its reverse (52122410561), we get a palindrome (68623832686).

The spelling of 16501422125 in words is "sixteen billion, five hundred one million, four hundred twenty-two thousand, one hundred twenty-five".