16690636425 has 12 divisors (see below), whose sum is σ = 27595185680. Its totient is φ = 8901672720.

The previous prime is 16690636387. The next prime is 16690636429. The reversal of 16690636425 is 52463609661.

It is a happy number.

It is not a de Polignac number, because 16690636425 - 2¹³ = 16690628233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16690636429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111270835 + ... + 111270984.

Almost surely, 2^16690636425 is an apocalyptic number.

16690636425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16690636425 is a deficient number, since it is larger than the sum of its proper divisors (10904549255).

16690636425 is a wasteful number, since it uses less digits than its factorization.

16690636425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222541832 (or 222541827 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 48.

The spelling of 16690636425 in words is "sixteen billion, six hundred ninety million, six hundred thirty-six thousand, four hundred twenty-five".