16279012625 has 16 divisors (see below), whose sum is σ = 20381164752. Its totient is φ = 12981571200.

The previous prime is 16279012621. The next prime is 16279012669. The reversal of 16279012625 is 52621097261.

It can be written as a sum of positive squares in 8 ways, for example, as 10229906449 + 6049106176 = 101143^2 + 77776^2 .

It is not a de Polignac number, because 16279012625 - 2² = 16279012621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16279012621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168914 + ... + 247163.

It is an arithmetic number, because the mean of its divisors is an integer number (1273822797).

Almost surely, 2^16279012625 is an apocalyptic number.

It is an amenable number.

16279012625 is a deficient number, since it is larger than the sum of its proper divisors (4102152127).

16279012625 is an equidigital number, since it uses as much as digits as its factorization.

16279012625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416405 (or 416395 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 16279012625 in words is "sixteen billion, two hundred seventy-nine million, twelve thousand, six hundred twenty-five".