16168862825 has 24 divisors (see below), whose sum is σ = 20390628696. Its totient is φ = 12715200000.

The previous prime is 16168862777. The next prime is 16168862863. The reversal of 16168862825 is 52826886161.

It can be written as a sum of positive squares in 12 ways, for example, as 5851179049 + 10317683776 = 76493^2 + 101576^2 .

It is not a de Polignac number, because 16168862825 - 2⁶ = 16168862761 is a prime.

It is a super-2 number, since 2×16168862825² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4574759 + ... + 4578291.

It is an arithmetic number, because the mean of its divisors is an integer number (849609529).

Almost surely, 2^16168862825 is an apocalyptic number.

It is an amenable number.

16168862825 is a deficient number, since it is larger than the sum of its proper divisors (4221765871).

16168862825 is a wasteful number, since it uses less digits than its factorization.

16168862825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6605 (or 6600 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 53.

The spelling of 16168862825 in words is "sixteen billion, one hundred sixty-eight million, eight hundred sixty-two thousand, eight hundred twenty-five".