16700340426025 has 9 divisors (see below), whose sum is σ = 20708447465253. Its totient is φ = 13360255994400.

The previous prime is 16700340426023. The next prime is 16700340426031. The reversal of 16700340426025 is 52062404300761.

The square root of 16700340426025 is 4086605.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 5257789382169 + 11442551043856 = 2292987^2 + 3382684^2 .

It is not a de Polignac number, because 16700340426025 - 2¹ = 16700340426023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16700340426023) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 20024365 + ... + 20841685.

Almost surely, 2^{16700340426025} is an apocalyptic number.

16700340426025 is the 4086605-th square number.

16700340426025 is the 2043303-rd centered octagonal number.

It is an amenable number.

16700340426025 is a deficient number, since it is larger than the sum of its proper divisors (4008107039228).

16700340426025 is an frugal number, since it uses more digits than its factorization.

16700340426025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634652 (or 817326 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

Adding to 16700340426025 its reverse (52062404300761), we get a palindrome (68762744726786).

The spelling of 16700340426025 in words is "sixteen trillion, seven hundred billion, three hundred forty million, four hundred twenty-six thousand, twenty-five".